Finding the Fourth Proportional to 2,083.55, 2,875.26 and 1,139.33

Step by Step Solution

1. Step 1: Write the proportion equation
   2,083.55 : 2,875.26 = 1,139.33 : x
2. Step 2: Convert to fraction form
   2,083.55/2,875.26 = 1,139.33/x
3. Step 3: Cross multiply
   2,083.55x = 2,875.26 × 1,139.33
4. Step 4: Simplify right side
   2,083.55x = 3,275,884.50
5. Step 5: Solve for x
   x = 3,275,884.50/2,083.55
6. Step 6: Final answer
   x = 1,572.26