Finding the Fourth Proportional to 1,249.46, 1,724.18 and 689.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,249.46 : 1,724.18 = 689.82 : x
2. Step 2: Convert to fraction form
   1,249.46/1,724.18 = 689.82/x
3. Step 3: Cross multiply
   1,249.46x = 1,724.18 × 689.82
4. Step 4: Simplify right side
   1,249.46x = 1,189,370.40
5. Step 5: Solve for x
   x = 1,189,370.40/1,249.46
6. Step 6: Final answer
   x = 951.91