Finding the Fourth Proportional to 2,083.48, 2,875.19 and 1,139.29

Step by Step Solution

1. Step 1: Write the proportion equation
   2,083.48 : 2,875.19 = 1,139.29 : x
2. Step 2: Convert to fraction form
   2,083.48/2,875.19 = 1,139.29/x
3. Step 3: Cross multiply
   2,083.48x = 2,875.19 × 1,139.29
4. Step 4: Simplify right side
   2,083.48x = 3,275,662.33
5. Step 5: Solve for x
   x = 3,275,662.33/2,083.48
6. Step 6: Final answer
   x = 1,572.21