Finding the Fourth Proportional to 21,604.83, 32,406.17 and 8,459.61

Step by Step Solution

1. Step 1: Write the proportion equation
   21,604.83 : 32,406.17 = 8,459.61 : x
2. Step 2: Convert to fraction form
   21,604.83/32,406.17 = 8,459.61/x
3. Step 3: Cross multiply
   21,604.83x = 32,406.17 × 8,459.61
4. Step 4: Simplify right side
   21,604.83x = 274,143,517.50
5. Step 5: Solve for x
   x = 274,143,517.50/21,604.83
6. Step 6: Final answer
   x = 12,688.99