Finding the Fourth Proportional to 87,171.50, 130,776.69 and 31,767.50

Step by Step Solution

1. Step 1: Write the proportion equation
   87,171.50 : 130,776.69 = 31,767.50 : x
2. Step 2: Convert to fraction form
   87,171.50/130,776.69 = 31,767.50/x
3. Step 3: Cross multiply
   87,171.50x = 130,776.69 × 31,767.50
4. Step 4: Simplify right side
   87,171.50x = 4,154,448,499.58
5. Step 5: Solve for x
   x = 4,154,448,499.58/87,171.50
6. Step 6: Final answer
   x = 47,658.33