Finding the Fourth Proportional to 115,644.17, 159,589.22 and 64,658.72

Step by Step Solution

1. Step 1: Write the proportion equation
   115,644.17 : 159,589.22 = 64,658.72 : x
2. Step 2: Convert to fraction form
   115,644.17/159,589.22 = 64,658.72/x
3. Step 3: Cross multiply
   115,644.17x = 159,589.22 × 64,658.72
4. Step 4: Simplify right side
   115,644.17x = 10,318,834,691.00
5. Step 5: Solve for x
   x = 10,318,834,691.00/115,644.17
6. Step 6: Final answer
   x = 89,229.18