Finding the Fourth Proportional to 1,165.78, 1,608.15 and 834.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,165.78 : 1,608.15 = 834.42 : x
2. Step 2: Convert to fraction form
   1,165.78/1,608.15 = 834.42/x
3. Step 3: Cross multiply
   1,165.78x = 1,608.15 × 834.42
4. Step 4: Simplify right side
   1,165.78x = 1,341,872.52
5. Step 5: Solve for x
   x = 1,341,872.52/1,165.78
6. Step 6: Final answer
   x = 1,151.05