Finding the Fourth Proportional to 1,083.57, 1,494.46 and 689.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,083.57 : 1,494.46 = 689.91 : x
2. Step 2: Convert to fraction form
   1,083.57/1,494.46 = 689.91/x
3. Step 3: Cross multiply
   1,083.57x = 1,494.46 × 689.91
4. Step 4: Simplify right side
   1,083.57x = 1,031,042.90
5. Step 5: Solve for x
   x = 1,031,042.90/1,083.57
6. Step 6: Final answer
   x = 951.52