Finding the Fourth Proportional to 56,581.92, 78,086.88 and 31,430.88

Step by Step Solution

1. Step 1: Write the proportion equation
   56,581.92 : 78,086.88 = 31,430.88 : x
2. Step 2: Convert to fraction form
   56,581.92/78,086.88 = 31,430.88/x
3. Step 3: Cross multiply
   56,581.92x = 78,086.88 × 31,430.88
4. Step 4: Simplify right side
   56,581.92x = 2,454,339,354.85
5. Step 5: Solve for x
   x = 2,454,339,354.85/56,581.92
6. Step 6: Final answer
   x = 43,376.74