Finding the Fourth Proportional to 9,789.08, 13,507.60 and 5,540.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,789.08 : 13,507.60 = 5,540.72 : x
2. Step 2: Convert to fraction form
   9,789.08/13,507.60 = 5,540.72/x
3. Step 3: Cross multiply
   9,789.08x = 13,507.60 × 5,540.72
4. Step 4: Simplify right side
   9,789.08x = 74,841,829.47
5. Step 5: Solve for x
   x = 74,841,829.47/9,789.08
6. Step 6: Final answer
   x = 7,645.44