Finding the Fourth Proportional to 10,144.72, 15,176.46 and 8,772.88

Step by Step Solution

1. Step 1: Write the proportion equation
   10,144.72 : 15,176.46 = 8,772.88 : x
2. Step 2: Convert to fraction form
   10,144.72/15,176.46 = 8,772.88/x
3. Step 3: Cross multiply
   10,144.72x = 15,176.46 × 8,772.88
4. Step 4: Simplify right side
   10,144.72x = 133,141,262.40
5. Step 5: Solve for x
   x = 133,141,262.40/10,144.72
6. Step 6: Final answer
   x = 13,124.19