Finding the Fourth Proportional to 56,942, 78,580.32 and 31,791.68

Step by Step Solution

1. Step 1: Write the proportion equation
   56,942 : 78,580.32 = 31,791.68 : x
2. Step 2: Convert to fraction form
   56,942/78,580.32 = 31,791.68/x
3. Step 3: Cross multiply
   56,942x = 78,580.32 × 31,791.68
4. Step 4: Simplify right side
   56,942x = 2,498,200,387.74
5. Step 5: Solve for x
   x = 2,498,200,387.74/56,942
6. Step 6: Final answer
   x = 43,872.72