Finding the Fourth Proportional to 87,730.81, 131,613.98 and 28,550.59

Step by Step Solution

1. Step 1: Write the proportion equation
   87,730.81 : 131,613.98 = 28,550.59 : x
2. Step 2: Convert to fraction form
   87,730.81/131,613.98 = 28,550.59/x
3. Step 3: Cross multiply
   87,730.81x = 131,613.98 × 28,550.59
4. Step 4: Simplify right side
   87,730.81x = 3,757,656,309.46
5. Step 5: Solve for x
   x = 3,757,656,309.46/87,730.81
6. Step 6: Final answer
   x = 42,831.66