Finding the Fourth Proportional to 2,083.22, 2,874.85 and 1,139.00

Step by Step Solution

1. Step 1: Write the proportion equation
   2,083.22 : 2,874.85 = 1,139.00 : x
2. Step 2: Convert to fraction form
   2,083.22/2,874.85 = 1,139.00/x
3. Step 3: Cross multiply
   2,083.22x = 2,874.85 × 1,139.00
4. Step 4: Simplify right side
   2,083.22x = 3,274,439.78
5. Step 5: Solve for x
   x = 3,274,439.78/2,083.22
6. Step 6: Final answer
   x = 1,571.82