Finding the Fourth Proportional to 2,083.02, 2,874.49 and 1,138.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,083.02 : 2,874.49 = 1,138.78 : x
2. Step 2: Convert to fraction form
   2,083.02/2,874.49 = 1,138.78/x
3. Step 3: Cross multiply
   2,083.02x = 2,874.49 × 1,138.78
4. Step 4: Simplify right side
   2,083.02x = 3,273,411.72
5. Step 5: Solve for x
   x = 3,273,411.72/2,083.02
6. Step 6: Final answer
   x = 1,571.47