Final answer:
To find the sum of 23,457.9 and 387.15, add the numbers together to get 23,845.05.
Step-by-step explanation:
To find the sum of 23,457.9 and 387.15, simply add the two numbers together:
23,457.9 + 387.15 = 23,845.05
Learn more about Finding the sum of two numbers in a mathematical context