Finding the Fourth Proportional to 10,423.52, 15,621.12 and 5,744.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,423.52 : 15,621.12 = 5,744.72 : x
2. Step 2: Convert to fraction form
   10,423.52/15,621.12 = 5,744.72/x
3. Step 3: Cross multiply
   10,423.52x = 15,621.12 × 5,744.72
4. Step 4: Simplify right side
   10,423.52x = 89,738,960.49
5. Step 5: Solve for x
   x = 89,738,960.49/10,423.52
6. Step 6: Final answer
   x = 8,609.28