Finding the Fourth Proportional to 56,709.52, 78,258.15 and 31,216.39

Step by Step Solution

1. Step 1: Write the proportion equation
   56,709.52 : 78,258.15 = 31,216.39 : x
2. Step 2: Convert to fraction form
   56,709.52/78,258.15 = 31,216.39/x
3. Step 3: Cross multiply
   56,709.52x = 78,258.15 × 31,216.39
4. Step 4: Simplify right side
   56,709.52x = 2,442,936,735.43
5. Step 5: Solve for x
   x = 2,442,936,735.43/56,709.52
6. Step 6: Final answer
   x = 43,078.07