Finding the Fourth Proportional to 1,078.92, 1,488.78 and 606.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,078.92 : 1,488.78 = 606.78 : x
2. Step 2: Convert to fraction form
   1,078.92/1,488.78 = 606.78/x
3. Step 3: Cross multiply
   1,078.92x = 1,488.78 × 606.78
4. Step 4: Simplify right side
   1,078.92x = 903,361.93
5. Step 5: Solve for x
   x = 903,361.93/1,078.92
6. Step 6: Final answer
   x = 837.28