Finding the Fourth Proportional to 56,913.39, 78,540.61 and 31,419.77

Step by Step Solution

1. Step 1: Write the proportion equation
   56,913.39 : 78,540.61 = 31,419.77 : x
2. Step 2: Convert to fraction form
   56,913.39/78,540.61 = 31,419.77/x
3. Step 3: Cross multiply
   56,913.39x = 78,540.61 × 31,419.77
4. Step 4: Simplify right side
   56,913.39x = 2,467,727,765.63
5. Step 5: Solve for x
   x = 2,467,727,765.63/56,913.39
6. Step 6: Final answer
   x = 43,359.36