Finding the Fourth Proportional to 1,081.98, 1,493.04 and 616.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,081.98 : 1,493.04 = 616.23 : x
2. Step 2: Convert to fraction form
   1,081.98/1,493.04 = 616.23/x
3. Step 3: Cross multiply
   1,081.98x = 1,493.04 × 616.23
4. Step 4: Simplify right side
   1,081.98x = 920,056.04
5. Step 5: Solve for x
   x = 920,056.04/1,081.98
6. Step 6: Final answer
   x = 850.34