Finding the Fourth Proportional to 20,499.56, 28,304.56 and 12,552.62

Step by Step Solution

1. Step 1: Write the proportion equation
   20,499.56 : 28,304.56 = 12,552.62 : x
2. Step 2: Convert to fraction form
   20,499.56/28,304.56 = 12,552.62/x
3. Step 3: Cross multiply
   20,499.56x = 28,304.56 × 12,552.62
4. Step 4: Simplify right side
   20,499.56x = 355,296,385.95
5. Step 5: Solve for x
   x = 355,296,385.95/20,499.56
6. Step 6: Final answer
   x = 17,331.90