Finding the Fourth Proportional to 66,499.52, 91,755.88 and 42,310.10

Step by Step Solution

1. Step 1: Write the proportion equation
   66,499.52 : 91,755.88 = 42,310.10 : x
2. Step 2: Convert to fraction form
   66,499.52/91,755.88 = 42,310.10/x
3. Step 3: Cross multiply
   66,499.52x = 91,755.88 × 42,310.10
4. Step 4: Simplify right side
   66,499.52x = 3,882,200,458.39
5. Step 5: Solve for x
   x = 3,882,200,458.39/66,499.52
6. Step 6: Final answer
   x = 58,379.38