The correct answer is Sixth. According to Forbes' "Real-Time Billionaires List" featuring the richest persons around the world, Mukesh Ambani features in the sixth spot, while Gautam Adani occupies the seventh spot. Mukesh Ambani has a net worth of $103. 1 billion, according to Forbes' "Real-Time Billionaires List". The Bloomberg Billionaires Index shows Ambani has a net worth of $101 billion. Mukesh Ambani and Gautam Adani are the richest men in India as well as Asia. In the "Bloomberg Billionaires Index", Mukesh Ambani is in the eighth spot, and Gautam Adani is in the ninth position. Additional Information The World's Billionaires. The World's Billionaires is an annual ranking by documented net worth of the wealthiest billionaires in the world. As of 2018, Microsoft founder Bill Gates had topped the list in 18 of the past 24 years. Published by Integrated Whale Media Investments and the Forbes family.