The arithmetic mean of the monthly salaries of two people is ​$4455. One person earns ​$3586 per month. What is the monthly salary of the other​ person?

Let the monthly salary of the other person be x.

Then, the total of their salaries is $4455 + $3586 = $8041.

Therefore, x + $3586 = $8041
x = $8041 - $3586
x = $4455

So, the monthly salary of the other person is $4455.