Finding the Fourth Proportional to 2,578.94, 3,868.72 and 936.26

Step by Step Solution

1. Step 1: Write the proportion equation
   2,578.94 : 3,868.72 = 936.26 : x
2. Step 2: Convert to fraction form
   2,578.94/3,868.72 = 936.26/x
3. Step 3: Cross multiply
   2,578.94x = 3,868.72 × 936.26
4. Step 4: Simplify right side
   2,578.94x = 3,622,127.79
5. Step 5: Solve for x
   x = 3,622,127.79/2,578.94
6. Step 6: Final answer
   x = 1,404.50