Finding the Fourth Proportional to 1,139.94, 1,708.86 and 833.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,139.94 : 1,708.86 = 833.29 : x
2. Step 2: Convert to fraction form
   1,139.94/1,708.86 = 833.29/x
3. Step 3: Cross multiply
   1,139.94x = 1,708.86 × 833.29
4. Step 4: Simplify right side
   1,139.94x = 1,423,974.80
5. Step 5: Solve for x
   x = 1,423,974.80/1,139.94
6. Step 6: Final answer
   x = 1,249.17