Finding the Fourth Proportional to 2,023.48, 2,792.42 and 1,139.11

Step by Step Solution

1. Step 1: Write the proportion equation
   2,023.48 : 2,792.42 = 1,139.11 : x
2. Step 2: Convert to fraction form
   2,023.48/2,792.42 = 1,139.11/x
3. Step 3: Cross multiply
   2,023.48x = 2,792.42 × 1,139.11
4. Step 4: Simplify right side
   2,023.48x = 3,180,873.55
5. Step 5: Solve for x
   x = 3,180,873.55/2,023.48
6. Step 6: Final answer
   x = 1,571.98