Finding the Fourth Proportional to 56,864.08, 78,472.56 and 31,715.20

Step by Step Solution

1. Step 1: Write the proportion equation
   56,864.08 : 78,472.56 = 31,715.20 : x
2. Step 2: Convert to fraction form
   56,864.08/78,472.56 = 31,715.20/x
3. Step 3: Cross multiply
   56,864.08x = 78,472.56 × 31,715.20
4. Step 4: Simplify right side
   56,864.08x = 2,488,772,934.91
5. Step 5: Solve for x
   x = 2,488,772,934.91/56,864.08
6. Step 6: Final answer
   x = 43,767.05