Finding the Fourth Proportional to 2,023.65, 2,792.52 and 1,139.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,023.65 : 2,792.52 = 1,139.40 : x
2. Step 2: Convert to fraction form
   2,023.65/2,792.52 = 1,139.40/x
3. Step 3: Cross multiply
   2,023.65x = 2,792.52 × 1,139.40
4. Step 4: Simplify right side
   2,023.65x = 3,181,797.29
5. Step 5: Solve for x
   x = 3,181,797.29/2,023.65
6. Step 6: Final answer
   x = 1,572.31