Finding the Fourth Proportional to 1,158.78, 1,736.41 and 850.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,158.78 : 1,736.41 = 850.17 : x
2. Step 2: Convert to fraction form
   1,158.78/1,736.41 = 850.17/x
3. Step 3: Cross multiply
   1,158.78x = 1,736.41 × 850.17
4. Step 4: Simplify right side
   1,158.78x = 1,476,243.69
5. Step 5: Solve for x
   x = 1,476,243.69/1,158.78
6. Step 6: Final answer
   x = 1,273.96