Rickelton contributed a crucial 101 runs, while Mulder anchored the lower order with an unbeaten 115, sharing a spirited final-wicket partnership with Kagiso Rabada before the innings concluded in the final over of the day. The formidable total leaves Australia needing 288 on the final day to secure victory and claim the series.

The day began with South Africa facing a severe deficit after Australia had posted 429 in their first innings, which included a century from Josh Inglis and strong bowling from Simon Harmer, who claimed four wickets. Trailing significantly on first-innings runs, the Proteas needed stability and found it through the resilience of their middle and lower orders.

Rickelton batted with immense discipline through the morning and afternoon sessions, steering his side away from danger alongside the experienced members of the batting lineup. His composure under pressure allowed South Africa to slowly chip away at Australia's advantage and build a meaningful lead on a surface that offered increasing challenges as the match progressed.

Mulder then took center stage, displaying exceptional shot selection and defensive resolve to reach his fourth Test century. As wickets tumbled around him in a late afternoon collapse that saw four batters dismissed for 61 runs, Mulder continued to farm the strike and frustrate the visiting bowling attack.

The highlight of the lower-order resistance was Mulder's partnership with number 11 Rabada, as the pair added 36 crucial runs before the innings finally wrapped up. This late flurry pushed the total to 387, completely transforming the complexion of the match and shifting the psychological pressure firmly onto the Australian dressing room.

Australia's bowling attack toiled hard in warm conditions, with their frontline bowlers visibly tiring during the extended sessions. However, they managed to spark a late flurry of wickets through disciplined lines and sharp fielding, which included run-outs that briefly checked South Africa's momentum near the close of play.

Spin bowler Harmer is expected to play a pivotal role for South Africa on the final day, given his success in the first innings where he removed key Australian batters including Travis Head, Marnus Labuschagne, Inglis, and Alex Carey. The pitch has begun to show variable bounce and increased turn, offering encouragement to the slow bowlers as the contest enters its climax.

Historically, chasing a target approaching 300 in the fourth innings at Newlands is a formidable task, with only one higher successful chase recorded at the historic ground. That notable precedent belongs to Australia, who successfully chased 331 for victory against the Proteas in an encounter back in 2002 featuring a memorable century from Ricky Ponting.

Recent history also suggests Australia possess the capability to perform under pressure in run chases, having successfully overhauled challenging targets in recent years under the leadership of Pat Cummins. Their modern batting lineup boasts aggressive stroke-makers capable of shifting the momentum of a match in a single session.

The stakes could hardly be higher for both nations, with the winner of this deciding Test match also securing the top position in the International Cricket Council Test rankings. Both teams have played intensely competitive cricket throughout the series, making this final day a fitting conclusion to a closely contested tour.

As day five dawns in Cape Town, the match remains evenly poised with analysts giving the hosts a slight edge, though the unpredictable nature of fourth-innings pressure leaves the outcome entirely open. The opening session will likely dictate whether Australia launch a bold pursuit or whether South Africa's bowlers can exploit the wearing surface to seal a famous series triumph.