Finding the Fourth Proportional to 17,688.99, 24,407.55 and 10,521.30

Step by Step Solution

1. Step 1: Write the proportion equation
   17,688.99 : 24,407.55 = 10,521.30 : x
2. Step 2: Convert to fraction form
   17,688.99/24,407.55 = 10,521.30/x
3. Step 3: Cross multiply
   17,688.99x = 24,407.55 × 10,521.30
4. Step 4: Simplify right side
   17,688.99x = 256,799,155.82
5. Step 5: Solve for x
   x = 256,799,155.82/17,688.99
6. Step 6: Final answer
   x = 14,517.46