Finding the Fourth Proportional to 71,892.72, 108,227.28 and 64,659.18

Step by Step Solution

1. Step 1: Write the proportion equation
   71,892.72 : 108,227.28 = 64,659.18 : x
2. Step 2: Convert to fraction form
   71,892.72/108,227.28 = 64,659.18/x
3. Step 3: Cross multiply
   71,892.72x = 108,227.28 × 64,659.18
4. Step 4: Simplify right side
   71,892.72x = 6,997,887,178.43
5. Step 5: Solve for x
   x = 6,997,887,178.43/71,892.72
6. Step 6: Final answer
   x = 97,337.91