Finding the Fourth Proportional to 66,436.38, 91,630.37 and 42,565.29

Step by Step Solution

1. Step 1: Write the proportion equation
   66,436.38 : 91,630.37 = 42,565.29 : x
2. Step 2: Convert to fraction form
   66,436.38/91,630.37 = 42,565.29/x
3. Step 3: Cross multiply
   66,436.38x = 91,630.37 × 42,565.29
4. Step 4: Simplify right side
   66,436.38x = 3,900,273,059.03
5. Step 5: Solve for x
   x = 3,900,273,059.03/66,436.38
6. Step 6: Final answer
   x = 58,706.89