1,234,567.89

>1,234,567.89
>1,234,567·89
>1.234.567,89
>1˙234˙567,89
>12,34,567.89
>1'234'567.89
>1.234.567,89
>123,4567.89

Which system is best?

1 234 567.89

1234567.89

This.

t. Econ student so I have authority on the matter.

I like first the most, if we both agree that .89

First answer best answer.

123.456.789

Nobody uses that last system, surely.

1,234,567.89

suomessa käytetään muuten desimaalipilkkua eikä pistettä, arvon turvenuija

the jew is correct

this desu

dig nigga knows how to count shekels

I'll have to overrule you here. First on OP's list clearly balances readability and sense the best.

t. Maths student so I have more authority on the matter.

1,234,567.89

>Ireland
>doesn't even have authority over Northern Ireland

Not so fast, Paddy

1E+6 + 2E+5 + 3E+4 + 4E+3 + 5E+2 + 6E+1 + 7E+0 + 8E-1 + 9E-10

Objectively the best system.

>Sweden
>doesn't even have authority over whether he gets to leave the cuck shed

Not today, Sven

If you use decimal points to separate large numbers you are a retard.
If you use apostrophes to separate large numbers you are a retard.
If you use spaces to separate large numbers you are a retard.

1,234,567.89 master race.

You forgot the correct one:
>1 234 567,89

1.23456789x10^6

...