Finding the Fourth Proportional to 2,440.28, 3,658.25 and 978.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,440.28 : 3,658.25 = 978.43 : x
2. Step 2: Convert to fraction form
   2,440.28/3,658.25 = 978.43/x
3. Step 3: Cross multiply
   2,440.28x = 3,658.25 × 978.43
4. Step 4: Simplify right side
   2,440.28x = 3,579,334.85
5. Step 5: Solve for x
   x = 3,579,334.85/2,440.28
6. Step 6: Final answer
   x = 1,466.78