Finding the Fourth Proportional to 2,082.57, 2,874.57 and 1,243.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,082.57 : 2,874.57 = 1,243.86 : x
2. Step 2: Convert to fraction form
   2,082.57/2,874.57 = 1,243.86/x
3. Step 3: Cross multiply
   2,082.57x = 2,874.57 × 1,243.86
4. Step 4: Simplify right side
   2,082.57x = 3,575,562.64
5. Step 5: Solve for x
   x = 3,575,562.64/2,082.57
6. Step 6: Final answer
   x = 1,716.90