Finding the Fourth Proportional to 2,578.41, 3,866.70 and 934.53

Step by Step Solution

1. Step 1: Write the proportion equation
   2,578.41 : 3,866.70 = 934.53 : x
2. Step 2: Convert to fraction form
   2,578.41/3,866.70 = 934.53/x
3. Step 3: Cross multiply
   2,578.41x = 3,866.70 × 934.53
4. Step 4: Simplify right side
   2,578.41x = 3,613,547.15
5. Step 5: Solve for x
   x = 3,613,547.15/2,578.41
6. Step 6: Final answer
   x = 1,401.46