Finding the Fourth Proportional to 2,023.76, 2,792.68 and 1,139.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,023.76 : 2,792.68 = 1,139.54 : x
2. Step 2: Convert to fraction form
   2,023.76/2,792.68 = 1,139.54/x
3. Step 3: Cross multiply
   2,023.76x = 2,792.68 × 1,139.54
4. Step 4: Simplify right side
   2,023.76x = 3,182,370.57
5. Step 5: Solve for x
   x = 3,182,370.57/2,023.76
6. Step 6: Final answer
   x = 1,572.50