Finding the Fourth Proportional to 28,331.88, 42,498.71 and 8,610.60

Step by Step Solution

1. Step 1: Write the proportion equation
   28,331.88 : 42,498.71 = 8,610.60 : x
2. Step 2: Convert to fraction form
   28,331.88/42,498.71 = 8,610.60/x
3. Step 3: Cross multiply
   28,331.88x = 42,498.71 × 8,610.60
4. Step 4: Simplify right side
   28,331.88x = 365,939,392.33
5. Step 5: Solve for x
   x = 365,939,392.33/28,331.88
6. Step 6: Final answer
   x = 12,916.17