Finding the Fourth Proportional to 2,389.54, 3,582.42 and 1,139.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,389.54 : 3,582.42 = 1,139.48 : x
2. Step 2: Convert to fraction form
   2,389.54/3,582.42 = 1,139.48/x
3. Step 3: Cross multiply
   2,389.54x = 3,582.42 × 1,139.48
4. Step 4: Simplify right side
   2,389.54x = 4,082,078.03
5. Step 5: Solve for x
   x = 4,082,078.03/2,389.54
6. Step 6: Final answer
   x = 1,708.31