Finding the Fourth Proportional to 1,168.90, 1,612.94 and 671.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,168.90 : 1,612.94 = 671.42 : x
2. Step 2: Convert to fraction form
   1,168.90/1,612.94 = 671.42/x
3. Step 3: Cross multiply
   1,168.90x = 1,612.94 × 671.42
4. Step 4: Simplify right side
   1,168.90x = 1,082,960.17
5. Step 5: Solve for x
   x = 1,082,960.17/1,168.90
6. Step 6: Final answer
   x = 926.48