Finding the Fourth Proportional to 21,550.10, 32,311.92 and 8,387.15

Step by Step Solution

1. Step 1: Write the proportion equation
   21,550.10 : 32,311.92 = 8,387.15 : x
2. Step 2: Convert to fraction form
   21,550.10/32,311.92 = 8,387.15/x
3. Step 3: Cross multiply
   21,550.10x = 32,311.92 × 8,387.15
4. Step 4: Simplify right side
   21,550.10x = 271,004,919.83
5. Step 5: Solve for x
   x = 271,004,919.83/21,550.10
6. Step 6: Final answer
   x = 12,575.58