Finding the Fourth Proportional to 56,150.67, 77,487.98 and 31,000.17

Step by Step Solution

1. Step 1: Write the proportion equation
   56,150.67 : 77,487.98 = 31,000.17 : x
2. Step 2: Convert to fraction form
   56,150.67/77,487.98 = 31,000.17/x
3. Step 3: Cross multiply
   56,150.67x = 77,487.98 × 31,000.17
4. Step 4: Simplify right side
   56,150.67x = 2,402,140,397.96
5. Step 5: Solve for x
   x = 2,402,140,397.96/56,150.67
6. Step 6: Final answer
   x = 42,780.26