Finding the Fourth Proportional to 56,624.38, 78,142.58 and 31,131.82

Step by Step Solution

1. Step 1: Write the proportion equation
   56,624.38 : 78,142.58 = 31,131.82 : x
2. Step 2: Convert to fraction form
   56,624.38/78,142.58 = 31,131.82/x
3. Step 3: Cross multiply
   56,624.38x = 78,142.58 × 31,131.82
4. Step 4: Simplify right side
   56,624.38x = 2,432,720,734.90
5. Step 5: Solve for x
   x = 2,432,720,734.90/56,624.38
6. Step 6: Final answer
   x = 42,962.43