Finding the Fourth Proportional to 10,979.28, 16,464.78 and 3,957.42

Step by Step Solution

1. Step 1: Write the proportion equation
   10,979.28 : 16,464.78 = 3,957.42 : x
2. Step 2: Convert to fraction form
   10,979.28/16,464.78 = 3,957.42/x
3. Step 3: Cross multiply
   10,979.28x = 16,464.78 × 3,957.42
4. Step 4: Simplify right side
   10,979.28x = 65,158,049.67
5. Step 5: Solve for x
   x = 65,158,049.67/10,979.28
6. Step 6: Final answer
   x = 5,934.64