Finding the Fourth Proportional to 56,614.38, 78,126.17 and 31,120.72

Step by Step Solution

1. Step 1: Write the proportion equation
   56,614.38 : 78,126.17 = 31,120.72 : x
2. Step 2: Convert to fraction form
   56,614.38/78,126.17 = 31,120.72/x
3. Step 3: Cross multiply
   56,614.38x = 78,126.17 × 31,120.72
4. Step 4: Simplify right side
   56,614.38x = 2,431,342,310.32
5. Step 5: Solve for x
   x = 2,431,342,310.32/56,614.38
6. Step 6: Final answer
   x = 42,945.67