Finding the Fourth Proportional to 2,238.78, 3,089.28 and 1,294.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,238.78 : 3,089.28 = 1,294.32 : x
2. Step 2: Convert to fraction form
   2,238.78/3,089.28 = 1,294.32/x
3. Step 3: Cross multiply
   2,238.78x = 3,089.28 × 1,294.32
4. Step 4: Simplify right side
   2,238.78x = 3,998,516.89
5. Step 5: Solve for x
   x = 3,998,516.89/2,238.78
6. Step 6: Final answer
   x = 1,786.02