Finding the Fourth Proportional to 2,443.30, 3,663.60 and 980.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,443.30 : 3,663.60 = 980.80 : x
2. Step 2: Convert to fraction form
   2,443.30/3,663.60 = 980.80/x
3. Step 3: Cross multiply
   2,443.30x = 3,663.60 × 980.80
4. Step 4: Simplify right side
   2,443.30x = 3,593,258.88
5. Step 5: Solve for x
   x = 3,593,258.88/2,443.30
6. Step 6: Final answer
   x = 1,470.66