Finding the Fourth Proportional to 1,081.86, 1,492.93 and 616.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,081.86 : 1,492.93 = 616.02 : x
2. Step 2: Convert to fraction form
   1,081.86/1,492.93 = 616.02/x
3. Step 3: Cross multiply
   1,081.86x = 1,492.93 × 616.02
4. Step 4: Simplify right side
   1,081.86x = 919,674.74
5. Step 5: Solve for x
   x = 919,674.74/1,081.86
6. Step 6: Final answer
   x = 850.09