Finding the Fourth Proportional to 2,286.25, 3,155.03 and 1,238.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,286.25 : 3,155.03 = 1,238.31 : x
2. Step 2: Convert to fraction form
   2,286.25/3,155.03 = 1,238.31/x
3. Step 3: Cross multiply
   2,286.25x = 3,155.03 × 1,238.31
4. Step 4: Simplify right side
   2,286.25x = 3,906,919.49
5. Step 5: Solve for x
   x = 3,906,919.49/2,286.25
6. Step 6: Final answer
   x = 1,708.88