Finding the Fourth Proportional to 8,759.13, 12,088.71 and 5,781.16

Step by Step Solution

1. Step 1: Write the proportion equation
   8,759.13 : 12,088.71 = 5,781.16 : x
2. Step 2: Convert to fraction form
   8,759.13/12,088.71 = 5,781.16/x
3. Step 3: Cross multiply
   8,759.13x = 12,088.71 × 5,781.16
4. Step 4: Simplify right side
   8,759.13x = 69,886,766.70
5. Step 5: Solve for x
   x = 69,886,766.70/8,759.13
6. Step 6: Final answer
   x = 7,978.73