Finding the Fourth Proportional to 2,540.30, 3,809.72 and 980.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,540.30 : 3,809.72 = 980.18 : x
2. Step 2: Convert to fraction form
   2,540.30/3,809.72 = 980.18/x
3. Step 3: Cross multiply
   2,540.30x = 3,809.72 × 980.18
4. Step 4: Simplify right side
   2,540.30x = 3,734,211.35
5. Step 5: Solve for x
   x = 3,734,211.35/2,540.30
6. Step 6: Final answer
   x = 1,469.99