Finding the Fourth Proportional to 12,393.72, 17,105.34 and 9,565.20

Step by Step Solution

1. Step 1: Write the proportion equation
   12,393.72 : 17,105.34 = 9,565.20 : x
2. Step 2: Convert to fraction form
   12,393.72/17,105.34 = 9,565.20/x
3. Step 3: Cross multiply
   12,393.72x = 17,105.34 × 9,565.20
4. Step 4: Simplify right side
   12,393.72x = 163,615,998.17
5. Step 5: Solve for x
   x = 163,615,998.17/12,393.72
6. Step 6: Final answer
   x = 13,201.52