Finding the Fourth Proportional to 9,540.69, 13,170.45 and 8,259.47

Step by Step Solution

1. Step 1: Write the proportion equation
   9,540.69 : 13,170.45 = 8,259.47 : x
2. Step 2: Convert to fraction form
   9,540.69/13,170.45 = 8,259.47/x
3. Step 3: Cross multiply
   9,540.69x = 13,170.45 × 8,259.47
4. Step 4: Simplify right side
   9,540.69x = 108,780,904.71
5. Step 5: Solve for x
   x = 108,780,904.71/9,540.69
6. Step 6: Final answer
   x = 11,401.79