Finding the Fourth Proportional to 2,439.86, 3,660.47 and 980.04

Step by Step Solution

1. Step 1: Write the proportion equation
   2,439.86 : 3,660.47 = 980.04 : x
2. Step 2: Convert to fraction form
   2,439.86/3,660.47 = 980.04/x
3. Step 3: Cross multiply
   2,439.86x = 3,660.47 × 980.04
4. Step 4: Simplify right side
   2,439.86x = 3,587,388.72
5. Step 5: Solve for x
   x = 3,587,388.72/2,439.86
6. Step 6: Final answer
   x = 1,470.33