Finding the Fourth Proportional to 2,578.25, 3,867.78 and 934.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,578.25 : 3,867.78 = 934.49 : x
2. Step 2: Convert to fraction form
   2,578.25/3,867.78 = 934.49/x
3. Step 3: Cross multiply
   2,578.25x = 3,867.78 × 934.49
4. Step 4: Simplify right side
   2,578.25x = 3,614,401.73
5. Step 5: Solve for x
   x = 3,614,401.73/2,578.25
6. Step 6: Final answer
   x = 1,401.88