It was Rajasthan Royals' High Performance Director and former Mumbai batter Zubin Bharucha who played a significant role in Jaiswal's rise after he spotted him the during the IPL trials.
The exact value is unknown, but it would be worth millions of pounds each year given his earning capacity in the IPL, according to the British newspaper, The Telegraph.
The pair had got engaged on Tuesday.
For Royals to have any hopes of progressing to the playoffs, both Royal Challengers Bangalore and Mumbai Indians should lose their final group games on Sunday.
The Sanju Samson-led side have moved into fifth position with a 4-wicket win.
RCB bowled Royals out for just 59 in 10.3 overs.
Their bowlers, led by Wayne Parnell (3/10), then put up scintillating display to bowl out RR for a paltry 59 in 10.3 overs.
Rawat produced a moment of brilliance to caught Ashwin short of the crease.
Kohli was deceived by the knuckle ball from Asif and was early into the shot.
Jaiswal remained two runs shy of a century (98 not out from 47 balls) as RR cantered to victory 13.1 overs.