Finding the Fourth Proportional to 56,708.96, 78,257.72 and 31,214.78

Step by Step Solution

1. Step 1: Write the proportion equation
   56,708.96 : 78,257.72 = 31,214.78 : x
2. Step 2: Convert to fraction form
   56,708.96/78,257.72 = 31,214.78/x
3. Step 3: Cross multiply
   56,708.96x = 78,257.72 × 31,214.78
4. Step 4: Simplify right side
   56,708.96x = 2,442,797,513.10
5. Step 5: Solve for x
   x = 2,442,797,513.10/56,708.96
6. Step 6: Final answer
   x = 43,076.04