Finding the Fourth Proportional to 1,168.61, 1,612.78 and 671.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,168.61 : 1,612.78 = 671.18 : x
2. Step 2: Convert to fraction form
   1,168.61/1,612.78 = 671.18/x
3. Step 3: Cross multiply
   1,168.61x = 1,612.78 × 671.18
4. Step 4: Simplify right side
   1,168.61x = 1,082,455.94
5. Step 5: Solve for x
   x = 1,082,455.94/1,168.61
6. Step 6: Final answer
   x = 926.28