Finding the Fourth Proportional to 7,728.06, 10,665.24 and 7,449.24

Step by Step Solution

1. Step 1: Write the proportion equation
   7,728.06 : 10,665.24 = 7,449.24 : x
2. Step 2: Convert to fraction form
   7,728.06/10,665.24 = 7,449.24/x
3. Step 3: Cross multiply
   7,728.06x = 10,665.24 × 7,449.24
4. Step 4: Simplify right side
   7,728.06x = 79,447,932.42
5. Step 5: Solve for x
   x = 79,447,932.42/7,728.06
6. Step 6: Final answer
   x = 10,280.45