Amazon.com CEO Jeff Bezos grew his wealth to $65.1 billion, becoming the third richest man in the world, CNBC's Robert Frank reported on "Power Lunch" Friday."His wealth has followed the roller coaster of Amazon stock over the past year," Frank explained. Amazon's stock has gained 25% in six months and Bezos' wealth grew with it.Bezos started the year off worth about $60 billion. When Amazon stock declined from its peak a few months ago, Bezos fell with it to around a $43 billion worth, according to Frank."Now it's $65.1 [billion], so he's added $22 billion to his wealth just over the past five months. That's just amazing," Frank said.

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