Finding the Fourth Proportional to 1,629.88, 2,431.56 and 1,396.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,629.88 : 2,431.56 = 1,396.04 : x
2. Step 2: Convert to fraction form
   1,629.88/2,431.56 = 1,396.04/x
3. Step 3: Cross multiply
   1,629.88x = 2,431.56 × 1,396.04
4. Step 4: Simplify right side
   1,629.88x = 3,394,555.02
5. Step 5: Solve for x
   x = 3,394,555.02/1,629.88
6. Step 6: Final answer
   x = 2,082.70