Finding the Fourth Proportional to 1,078.52, 1,617.37 and 850.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,078.52 : 1,617.37 = 850.10 : x
2. Step 2: Convert to fraction form
   1,078.52/1,617.37 = 850.10/x
3. Step 3: Cross multiply
   1,078.52x = 1,617.37 × 850.10
4. Step 4: Simplify right side
   1,078.52x = 1,374,913.90
5. Step 5: Solve for x
   x = 1,374,913.90/1,078.52
6. Step 6: Final answer
   x = 1,274.82