Finding the Fourth Proportional to 17,540.10, 24,180.17 and 10,821.20

Step by Step Solution

1. Step 1: Write the proportion equation
   17,540.10 : 24,180.17 = 10,821.20 : x
2. Step 2: Convert to fraction form
   17,540.10/24,180.17 = 10,821.20/x
3. Step 3: Cross multiply
   17,540.10x = 24,180.17 × 10,821.20
4. Step 4: Simplify right side
   17,540.10x = 261,658,280.60
5. Step 5: Solve for x
   x = 261,658,280.60/17,540.10
6. Step 6: Final answer
   x = 14,917.72