Finding the Fourth Proportional to 3,391.88, 5,086.86 and 1,082.12

Step by Step Solution

1. Step 1: Write the proportion equation
   3,391.88 : 5,086.86 = 1,082.12 : x
2. Step 2: Convert to fraction form
   3,391.88/5,086.86 = 1,082.12/x
3. Step 3: Cross multiply
   3,391.88x = 5,086.86 × 1,082.12
4. Step 4: Simplify right side
   3,391.88x = 5,504,592.94
5. Step 5: Solve for x
   x = 5,504,592.94/3,391.88
6. Step 6: Final answer
   x = 1,622.87