Finding the Fourth Proportional to 1,250.57, 1,726.17 and 857.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,250.57 : 1,726.17 = 857.72 : x
2. Step 2: Convert to fraction form
   1,250.57/1,726.17 = 857.72/x
3. Step 3: Cross multiply
   1,250.57x = 1,726.17 × 857.72
4. Step 4: Simplify right side
   1,250.57x = 1,480,570.53
5. Step 5: Solve for x
   x = 1,480,570.53/1,250.57
6. Step 6: Final answer
   x = 1,183.92