Finding the Fourth Proportional to 9,789.09, 13,508.87 and 5,540.12

Step by Step Solution

1. Step 1: Write the proportion equation
   9,789.09 : 13,508.87 = 5,540.12 : x
2. Step 2: Convert to fraction form
   9,789.09/13,508.87 = 5,540.12/x
3. Step 3: Cross multiply
   9,789.09x = 13,508.87 × 5,540.12
4. Step 4: Simplify right side
   9,789.09x = 74,840,760.86
5. Step 5: Solve for x
   x = 74,840,760.86/9,789.09
6. Step 6: Final answer
   x = 7,645.32