Finding the Fourth Proportional to 8,759.55, 12,088.17 and 5,615.74

Step by Step Solution

1. Step 1: Write the proportion equation
   8,759.55 : 12,088.17 = 5,615.74 : x
2. Step 2: Convert to fraction form
   8,759.55/12,088.17 = 5,615.74/x
3. Step 3: Cross multiply
   8,759.55x = 12,088.17 × 5,615.74
4. Step 4: Simplify right side
   8,759.55x = 67,884,019.80
5. Step 5: Solve for x
   x = 67,884,019.80/8,759.55
6. Step 6: Final answer
   x = 7,749.71