Finding the Fourth Proportional to 1,078.91, 1,488.77 and 606.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,078.91 : 1,488.77 = 606.71 : x
2. Step 2: Convert to fraction form
   1,078.91/1,488.77 = 606.71/x
3. Step 3: Cross multiply
   1,078.91x = 1,488.77 × 606.71
4. Step 4: Simplify right side
   1,078.91x = 903,241.17
5. Step 5: Solve for x
   x = 903,241.17/1,078.91
6. Step 6: Final answer
   x = 837.18