Finding the Fourth Proportional to 2,083.59, 2,875.23 and 1,139.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,083.59 : 2,875.23 = 1,139.20 : x
2. Step 2: Convert to fraction form
   2,083.59/2,875.23 = 1,139.20/x
3. Step 3: Cross multiply
   2,083.59x = 2,875.23 × 1,139.20
4. Step 4: Simplify right side
   2,083.59x = 3,275,469.20
5. Step 5: Solve for x
   x = 3,275,469.20/2,083.59
6. Step 6: Final answer
   x = 1,572.04