Finding the Fourth Proportional to 66,489.42, 91,755.42 and 42,616.10

Step by Step Solution

1. Step 1: Write the proportion equation
   66,489.42 : 91,755.42 = 42,616.10 : x
2. Step 2: Convert to fraction form
   66,489.42/91,755.42 = 42,616.10/x
3. Step 3: Cross multiply
   66,489.42x = 91,755.42 × 42,616.10
4. Step 4: Simplify right side
   66,489.42x = 3,910,257,947.43
5. Step 5: Solve for x
   x = 3,910,257,947.43/66,489.42
6. Step 6: Final answer
   x = 58,810.23