Finding the Fourth Proportional to 2,386.97, 3,578.89 and 926.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,386.97 : 3,578.89 = 926.27 : x
2. Step 2: Convert to fraction form
   2,386.97/3,578.89 = 926.27/x
3. Step 3: Cross multiply
   2,386.97x = 3,578.89 × 926.27
4. Step 4: Simplify right side
   2,386.97x = 3,315,018.44
5. Step 5: Solve for x
   x = 3,315,018.44/2,386.97
6. Step 6: Final answer
   x = 1,388.80