Finding the Fourth Proportional to 1,168.43, 1,612.43 and 644.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,168.43 : 1,612.43 = 644.46 : x
2. Step 2: Convert to fraction form
   1,168.43/1,612.43 = 644.46/x
3. Step 3: Cross multiply
   1,168.43x = 1,612.43 × 644.46
4. Step 4: Simplify right side
   1,168.43x = 1,039,146.64
5. Step 5: Solve for x
   x = 1,039,146.64/1,168.43
6. Step 6: Final answer
   x = 889.35