Finding the Fourth Proportional to 9,789.26, 13,505.90 and 5,539.74

Step by Step Solution

1. Step 1: Write the proportion equation
   9,789.26 : 13,505.90 = 5,539.74 : x
2. Step 2: Convert to fraction form
   9,789.26/13,505.90 = 5,539.74/x
3. Step 3: Cross multiply
   9,789.26x = 13,505.90 × 5,539.74
4. Step 4: Simplify right side
   9,789.26x = 74,819,174.47
5. Step 5: Solve for x
   x = 74,819,174.47/9,789.26
6. Step 6: Final answer
   x = 7,642.99