Finding the Fourth Proportional to 9,789.02, 13,509.39 and 5,540.30

Step by Step Solution

1. Step 1: Write the proportion equation
   9,789.02 : 13,509.39 = 5,540.30 : x
2. Step 2: Convert to fraction form
   9,789.02/13,509.39 = 5,540.30/x
3. Step 3: Cross multiply
   9,789.02x = 13,509.39 × 5,540.30
4. Step 4: Simplify right side
   9,789.02x = 74,846,073.42
5. Step 5: Solve for x
   x = 74,846,073.42/9,789.02
6. Step 6: Final answer
   x = 7,645.92