Finding the Fourth Proportional to 8,865.72, 13,294.17 and 5,168.88

Step by Step Solution

1. Step 1: Write the proportion equation
   8,865.72 : 13,294.17 = 5,168.88 : x
2. Step 2: Convert to fraction form
   8,865.72/13,294.17 = 5,168.88/x
3. Step 3: Cross multiply
   8,865.72x = 13,294.17 × 5,168.88
4. Step 4: Simplify right side
   8,865.72x = 68,715,969.43
5. Step 5: Solve for x
   x = 68,715,969.43/8,865.72
6. Step 6: Final answer
   x = 7,750.75