Finding the Fourth Proportional to 1,081.92, 1,493.04 and 616.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,081.92 : 1,493.04 = 616.20 : x
2. Step 2: Convert to fraction form
   1,081.92/1,493.04 = 616.20/x
3. Step 3: Cross multiply
   1,081.92x = 1,493.04 × 616.20
4. Step 4: Simplify right side
   1,081.92x = 920,011.25
5. Step 5: Solve for x
   x = 920,011.25/1,081.92
6. Step 6: Final answer
   x = 850.35