Finding the Fourth Proportional to 10,442.79, 14,411.97 and 5,728.05

Step by Step Solution

1. Step 1: Write the proportion equation
   10,442.79 : 14,411.97 = 5,728.05 : x
2. Step 2: Convert to fraction form
   10,442.79/14,411.97 = 5,728.05/x
3. Step 3: Cross multiply
   10,442.79x = 14,411.97 × 5,728.05
4. Step 4: Simplify right side
   10,442.79x = 82,552,484.76
5. Step 5: Solve for x
   x = 82,552,484.76/10,442.79
6. Step 6: Final answer
   x = 7,905.21