Finding the Fourth Proportional to 2,938.78, 4,399.62 and 2,287.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,938.78 : 4,399.62 = 2,287.54 : x
2. Step 2: Convert to fraction form
   2,938.78/4,399.62 = 2,287.54/x
3. Step 3: Cross multiply
   2,938.78x = 4,399.62 × 2,287.54
4. Step 4: Simplify right side
   2,938.78x = 10,064,306.73
5. Step 5: Solve for x
   x = 10,064,306.73/2,938.78
6. Step 6: Final answer
   x = 3,424.65