Final answer:
To round 1231.62567 to three decimal places, you look at the digit to the right of the third decimal place. If the digit is greater than 5, you round up the digit in the third decimal place.
Step-by-step explanation:
To round 1231.62567 to three decimal places, we look at the digit to the right of the third decimal place. In this case, the digit is 6, which is greater than 5.
Therefore, we round up the digit in the third decimal place. The final rounded answer is 1231.626.