Finding the Fourth Proportional to 131,553.64, 197,081.76 and 64,915.72

Step by Step Solution

1. Step 1: Write the proportion equation
   131,553.64 : 197,081.76 = 64,915.72 : x
2. Step 2: Convert to fraction form
   131,553.64/197,081.76 = 64,915.72/x
3. Step 3: Cross multiply
   131,553.64x = 197,081.76 × 64,915.72
4. Step 4: Simplify right side
   131,553.64x = 12,793,704,349.27
5. Step 5: Solve for x
   x = 12,793,704,349.27/131,553.64
6. Step 6: Final answer
   x = 97,250.86