Final answer:
To find the sixth number, subtract the sum of the first five numbers from the average multiplied by the total number of numbers.
Step-by-step explanation:
To find the sixth number, we first need to find the sum of the first five numbers.
Summing up the numbers 6.2, 5.1, 9.8, 8.8, and 10 gives us a sum of 40.9. Now, to find the sixth number, we can subtract the sum of the first five numbers from the average multiplied by the total number of numbers.
So, 48.6 multiplied by 6 minus 40.9 gives us the sixth number as 58.1.