Finding the Fourth Proportional to 87,731, 131,610.18 and 28,552.70

Step by Step Solution

1. Step 1: Write the proportion equation
   87,731 : 131,610.18 = 28,552.70 : x
2. Step 2: Convert to fraction form
   87,731/131,610.18 = 28,552.70/x
3. Step 3: Cross multiply
   87,731x = 131,610.18 × 28,552.70
4. Step 4: Simplify right side
   87,731x = 3,757,825,986.49
5. Step 5: Solve for x
   x = 3,757,825,986.49/87,731
6. Step 6: Final answer
   x = 42,833.50