Finding the Fourth Proportional to 1,078.40, 1,488.06 and 606.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,078.40 : 1,488.06 = 606.23 : x
2. Step 2: Convert to fraction form
   1,078.40/1,488.06 = 606.23/x
3. Step 3: Cross multiply
   1,078.40x = 1,488.06 × 606.23
4. Step 4: Simplify right side
   1,078.40x = 902,106.61
5. Step 5: Solve for x
   x = 902,106.61/1,078.40
6. Step 6: Final answer
   x = 836.52