Finding the Fourth Proportional to 1,078.83, 1,488.69 and 606.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,078.83 : 1,488.69 = 606.78 : x
2. Step 2: Convert to fraction form
   1,078.83/1,488.69 = 606.78/x
3. Step 3: Cross multiply
   1,078.83x = 1,488.69 × 606.78
4. Step 4: Simplify right side
   1,078.83x = 903,307.32
5. Step 5: Solve for x
   x = 903,307.32/1,078.83
6. Step 6: Final answer
   x = 837.30