Finding the Fourth Proportional to 2,082.62, 3,123.12 and 1,108.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,082.62 : 3,123.12 = 1,108.20 : x
2. Step 2: Convert to fraction form
   2,082.62/3,123.12 = 1,108.20/x
3. Step 3: Cross multiply
   2,082.62x = 3,123.12 × 1,108.20
4. Step 4: Simplify right side
   2,082.62x = 3,461,041.58
5. Step 5: Solve for x
   x = 3,461,041.58/2,082.62
6. Step 6: Final answer
   x = 1,661.87