Finding the Fourth Proportional to 8,553.84, 12,801.52 and 7,168.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,553.84 : 12,801.52 = 7,168.72 : x
2. Step 2: Convert to fraction form
   8,553.84/12,801.52 = 7,168.72/x
3. Step 3: Cross multiply
   8,553.84x = 12,801.52 × 7,168.72
4. Step 4: Simplify right side
   8,553.84x = 91,770,512.45
5. Step 5: Solve for x
   x = 91,770,512.45/8,553.84
6. Step 6: Final answer
   x = 10,728.57