Finding the Fourth Proportional to 1,434.38, 2,152.17 and 857.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,434.38 : 2,152.17 = 857.25 : x
2. Step 2: Convert to fraction form
   1,434.38/2,152.17 = 857.25/x
3. Step 3: Cross multiply
   1,434.38x = 2,152.17 × 857.25
4. Step 4: Simplify right side
   1,434.38x = 1,844,947.73
5. Step 5: Solve for x
   x = 1,844,947.73/1,434.38
6. Step 6: Final answer
   x = 1,286.24