Finding the Fourth Proportional to 69,044.28, 103,697.72 and 42,931.50

Step by Step Solution

1. Step 1: Write the proportion equation
   69,044.28 : 103,697.72 = 42,931.50 : x
2. Step 2: Convert to fraction form
   69,044.28/103,697.72 = 42,931.50/x
3. Step 3: Cross multiply
   69,044.28x = 103,697.72 × 42,931.50
4. Step 4: Simplify right side
   69,044.28x = 4,451,898,451.52
5. Step 5: Solve for x
   x = 4,451,898,451.52/69,044.28
6. Step 6: Final answer
   x = 64,478.89