Finding the Fourth Proportional to 1,082.76, 1,616.52 and 980.70

Step by Step Solution

1. Step 1: Write the proportion equation
   1,082.76 : 1,616.52 = 980.70 : x
2. Step 2: Convert to fraction form
   1,082.76/1,616.52 = 980.70/x
3. Step 3: Cross multiply
   1,082.76x = 1,616.52 × 980.70
4. Step 4: Simplify right side
   1,082.76x = 1,585,321.16
5. Step 5: Solve for x
   x = 1,585,321.16/1,082.76
6. Step 6: Final answer
   x = 1,464.15