Tesla and SpaceX CEO Elon Musk is now richer than Mukesh Ambani and Gautam Adani combined. According to Forbes' real-time billionaire rankings, Musk's net worth is $748.9 billion. Ambani ($113.5 billion) and Adani's ($66.8 billion) combined net worth is around $180 billion, less than one-fourth of Musk's fortune.