Finding the Fourth Proportional to 9,515.61, 13,131.60 and 5,539.02

Step by Step Solution

1. Step 1: Write the proportion equation
   9,515.61 : 13,131.60 = 5,539.02 : x
2. Step 2: Convert to fraction form
   9,515.61/13,131.60 = 5,539.02/x
3. Step 3: Cross multiply
   9,515.61x = 13,131.60 × 5,539.02
4. Step 4: Simplify right side
   9,515.61x = 72,736,195.03
5. Step 5: Solve for x
   x = 72,736,195.03/9,515.61
6. Step 6: Final answer
   x = 7,643.88