Finding the Fourth Proportional to 2,442.90, 3,661.71 and 903.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,442.90 : 3,661.71 = 903.78 : x
2. Step 2: Convert to fraction form
   2,442.90/3,661.71 = 903.78/x
3. Step 3: Cross multiply
   2,442.90x = 3,661.71 × 903.78
4. Step 4: Simplify right side
   2,442.90x = 3,309,380.26
5. Step 5: Solve for x
   x = 3,309,380.26/2,442.90
6. Step 6: Final answer
   x = 1,354.69