Business India's billionaire population fourth highest, says new survey Updated : May 18, 2018 04:22 PM IST The rise in the fortunes of Indian billionaires owe a lot to the reforms taking place in the country. Asia replaced North America as the continent with most number of billionaires. Mumbai came 9th in the list of cities with most number of billionaires. Subscribe to Moneycontrol PRO at just Rs.33/- per month for the first year. Use code SUPERPRO. Limited period offer. Available on Web and Android.