Finding the Fourth Proportional to 17,523.50, 24,153.62 and 12,420.72

Step by Step Solution

1. Step 1: Write the proportion equation
   17,523.50 : 24,153.62 = 12,420.72 : x
2. Step 2: Convert to fraction form
   17,523.50/24,153.62 = 12,420.72/x
3. Step 3: Cross multiply
   17,523.50x = 24,153.62 × 12,420.72
4. Step 4: Simplify right side
   17,523.50x = 300,005,288.90
5. Step 5: Solve for x
   x = 300,005,288.90/17,523.50
6. Step 6: Final answer
   x = 17,120.17