Finding the Fourth Proportional to 2,023.72, 2,792.90 and 1,139.74

Step by Step Solution

1. Step 1: Write the proportion equation
   2,023.72 : 2,792.90 = 1,139.74 : x
2. Step 2: Convert to fraction form
   2,023.72/2,792.90 = 1,139.74/x
3. Step 3: Cross multiply
   2,023.72x = 2,792.90 × 1,139.74
4. Step 4: Simplify right side
   2,023.72x = 3,183,179.85
5. Step 5: Solve for x
   x = 3,183,179.85/2,023.72
6. Step 6: Final answer
   x = 1,572.93