Finding the Fourth Proportional to 2,023.62, 2,792.57 and 1,139.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,023.62 : 2,792.57 = 1,139.43 : x
2. Step 2: Convert to fraction form
   2,023.62/2,792.57 = 1,139.43/x
3. Step 3: Cross multiply
   2,023.62x = 2,792.57 × 1,139.43
4. Step 4: Simplify right side
   2,023.62x = 3,181,928.21
5. Step 5: Solve for x
   x = 3,181,928.21/2,023.62
6. Step 6: Final answer
   x = 1,572.39