Finding the Fourth Proportional to 10,221.20, 14,105.76 and 5,744.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,221.20 : 14,105.76 = 5,744.72 : x
2. Step 2: Convert to fraction form
   10,221.20/14,105.76 = 5,744.72/x
3. Step 3: Cross multiply
   10,221.20x = 14,105.76 × 5,744.72
4. Step 4: Simplify right side
   10,221.20x = 81,033,641.59
5. Step 5: Solve for x
   x = 81,033,641.59/10,221.20
6. Step 6: Final answer
   x = 7,928.00