India’s Gautam Adani, who moved up one spot in Forbes’ Real-Time billionaire rankings after Bill Gates announced a huge new gift this week.

The billionaire math is simple when it comes to big charitable donations: Give money away and your net worth shrinks.

That’s what happened to Bill Gates, who is donating $20 billion to the Bill & Melinda Gates Foundation this month as part of the foundation’s effort to increase its annual giving 50% by 2026.

The shift in funds led to Adani moving into the No. 4 spot—Bill Gates’ prior rank. The Indian tycoon’s wealth has more than doubled since early 2021 to a current $112.9 billion.

Adani, an infrastructure tycoon, owns stakes in six publicly traded companies that bear his name and operate in power, green energy, gas, ports and more.

Adani overtook fellow Indian billionaire Mukesh Ambani to become Asia’s richest person in February. He was worth $90.1 billion at the time—and ranked tenth in the world.

Following his big gift news, Bill Gates falls just one spot on Forbes’ Real-Time Ranking of the World’s Billionaires, to No. 5 richest in the world, worth an estimated $102 billion.