Finding the Fourth Proportional to 75,909.55, 113,868.47 and 31,540.79

Step by Step Solution

1. Step 1: Write the proportion equation
   75,909.55 : 113,868.47 = 31,540.79 : x
2. Step 2: Convert to fraction form
   75,909.55/113,868.47 = 31,540.79/x
3. Step 3: Cross multiply
   75,909.55x = 113,868.47 × 31,540.79
4. Step 4: Simplify right side
   75,909.55x = 3,591,501,499.89
5. Step 5: Solve for x
   x = 3,591,501,499.89/75,909.55
6. Step 6: Final answer
   x = 47,312.91