let's set aside for a second the fact that this is not how things work, but you are off by an order of magnitude
EDIT: parent comment was edited: it used to say $15
> you are off by an order of magnitude
On which figure?
Not sure which number you're questioning, but it all looks right to me:
$852.7B[0] + $109.9B[0] = $962.6B ~= $1T ($1,000,000,000,000)
World population ~= 8.3B (8,300,000,000)[1]
$1,000,000,000,000 / 8,300,000,000 people = $120.481927711 per person[2]
[0] https://www.forbes.com/real-time-billionaires/
[1] https://www.worldometers.info/world-population/
[2] https://www.google.com/search?q=%241%2C000%2C000%2C000%2C000...
1 trillion divided by 8.5 billion is $117. Global GDP is around $126T, so accumulated wealth of less than 1% of global GDP can barely move the needle.