Finding the Fourth Proportional to 1,250.69, 1,725.98 and 691.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,250.69 : 1,725.98 = 691.20 : x
2. Step 2: Convert to fraction form
   1,250.69/1,725.98 = 691.20/x
3. Step 3: Cross multiply
   1,250.69x = 1,725.98 × 691.20
4. Step 4: Simplify right side
   1,250.69x = 1,192,993.92
5. Step 5: Solve for x
   x = 1,192,993.92/1,250.69
6. Step 6: Final answer
   x = 953.87