Finding the Fourth Proportional to 1,081.99, 1,493.10 and 616.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,081.99 : 1,493.10 = 616.15 : x
2. Step 2: Convert to fraction form
   1,081.99/1,493.10 = 616.15/x
3. Step 3: Cross multiply
   1,081.99x = 1,493.10 × 616.15
4. Step 4: Simplify right side
   1,081.99x = 919,966.10
5. Step 5: Solve for x
   x = 919,966.10/1,081.99
6. Step 6: Final answer
   x = 850.26