Finding the Fourth Proportional to 87,945.12, 131,915.83 and 21,385.59

Step by Step Solution

1. Step 1: Write the proportion equation
   87,945.12 : 131,915.83 = 21,385.59 : x
2. Step 2: Convert to fraction form
   87,945.12/131,915.83 = 21,385.59/x
3. Step 3: Cross multiply
   87,945.12x = 131,915.83 × 21,385.59
4. Step 4: Simplify right side
   87,945.12x = 2,821,097,854.89
5. Step 5: Solve for x
   x = 2,821,097,854.89/87,945.12
6. Step 6: Final answer
   x = 32,077.94