Finding the Fourth Proportional to 91,399.04, 137,076.50 and 31,420.52

Step by Step Solution

1. Step 1: Write the proportion equation
   91,399.04 : 137,076.50 = 31,420.52 : x
2. Step 2: Convert to fraction form
   91,399.04/137,076.50 = 31,420.52/x
3. Step 3: Cross multiply
   91,399.04x = 137,076.50 × 31,420.52
4. Step 4: Simplify right side
   91,399.04x = 4,307,014,909.78
5. Step 5: Solve for x
   x = 4,307,014,909.78/91,399.04
6. Step 6: Final answer
   x = 47,123.20