Finding the Fourth Proportional to 2,082.59, 3,123.27 and 986.66

Step by Step Solution

1. Step 1: Write the proportion equation
   2,082.59 : 3,123.27 = 986.66 : x
2. Step 2: Convert to fraction form
   2,082.59/3,123.27 = 986.66/x
3. Step 3: Cross multiply
   2,082.59x = 3,123.27 × 986.66
4. Step 4: Simplify right side
   2,082.59x = 3,081,589.96
5. Step 5: Solve for x
   x = 3,081,589.96/2,082.59
6. Step 6: Final answer
   x = 1,479.69