Finding the Fourth Proportional to 2,238.39, 3,089 and 1,243.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,238.39 : 3,089 = 1,243.78 : x
2. Step 2: Convert to fraction form
   2,238.39/3,089 = 1,243.78/x
3. Step 3: Cross multiply
   2,238.39x = 3,089 × 1,243.78
4. Step 4: Simplify right side
   2,238.39x = 3,842,036.42
5. Step 5: Solve for x
   x = 3,842,036.42/2,238.39
6. Step 6: Final answer
   x = 1,716.43