Finding the Fourth Proportional to 87,789.30, 131,649.93 and 31,617.42

Step by Step Solution

1. Step 1: Write the proportion equation
   87,789.30 : 131,649.93 = 31,617.42 : x
2. Step 2: Convert to fraction form
   87,789.30/131,649.93 = 31,617.42/x
3. Step 3: Cross multiply
   87,789.30x = 131,649.93 × 31,617.42
4. Step 4: Simplify right side
   87,789.30x = 4,162,431,129.78
5. Step 5: Solve for x
   x = 4,162,431,129.78/87,789.30
6. Step 6: Final answer
   x = 47,413.88