Finding the Fourth Proportional to 12,397.56, 17,080.09 and 8,565.53

Step by Step Solution

1. Step 1: Write the proportion equation
   12,397.56 : 17,080.09 = 8,565.53 : x
2. Step 2: Convert to fraction form
   12,397.56/17,080.09 = 8,565.53/x
3. Step 3: Cross multiply
   12,397.56x = 17,080.09 × 8,565.53
4. Step 4: Simplify right side
   12,397.56x = 146,300,023.30
5. Step 5: Solve for x
   x = 146,300,023.30/12,397.56
6. Step 6: Final answer
   x = 11,800.71