Finding the Fourth Proportional to 2,578.82, 3,868.72 and 935.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,578.82 : 3,868.72 = 935.42 : x
2. Step 2: Convert to fraction form
   2,578.82/3,868.72 = 935.42/x
3. Step 3: Cross multiply
   2,578.82x = 3,868.72 × 935.42
4. Step 4: Simplify right side
   2,578.82x = 3,618,878.06
5. Step 5: Solve for x
   x = 3,618,878.06/2,578.82
6. Step 6: Final answer
   x = 1,403.31