Finding the Fourth Proportional to 1,081.94, 1,492.90 and 616.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,081.94 : 1,492.90 = 616.10 : x
2. Step 2: Convert to fraction form
   1,081.94/1,492.90 = 616.10/x
3. Step 3: Cross multiply
   1,081.94x = 1,492.90 × 616.10
4. Step 4: Simplify right side
   1,081.94x = 919,775.69
5. Step 5: Solve for x
   x = 919,775.69/1,081.94
6. Step 6: Final answer
   x = 850.12