Finding the Fourth Proportional to 2,023.50, 2,792.45 and 1,139.26

Step by Step Solution

1. Step 1: Write the proportion equation
   2,023.50 : 2,792.45 = 1,139.26 : x
2. Step 2: Convert to fraction form
   2,023.50/2,792.45 = 1,139.26/x
3. Step 3: Cross multiply
   2,023.50x = 2,792.45 × 1,139.26
4. Step 4: Simplify right side
   2,023.50x = 3,181,326.59
5. Step 5: Solve for x
   x = 3,181,326.59/2,023.50
6. Step 6: Final answer
   x = 1,572.19