Finding the Fourth Proportional to 2,023.20, 2,792.02 and 1,139

Step by Step Solution

1. Step 1: Write the proportion equation
   2,023.20 : 2,792.02 = 1,139 : x
2. Step 2: Convert to fraction form
   2,023.20/2,792.02 = 1,139/x
3. Step 3: Cross multiply
   2,023.20x = 2,792.02 × 1,139
4. Step 4: Simplify right side
   2,023.20x = 3,180,110.78
5. Step 5: Solve for x
   x = 3,180,110.78/2,023.20
6. Step 6: Final answer
   x = 1,571.82