Answer
$$ 1786.19 \ million $$
Work Step by Step
We subtract the number of internet users in the table from the number of worldwide internet users. First estimating:
$$ 3131 \ million - 1345 \ million \\ 1786 \ million $$
The exact value is:
$$ = 3130.8 -1344.61 \ million \\ 1786.19 \ million $$