Finding the Fourth Proportional to 1,168.41, 1,612.41 and 644.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,168.41 : 1,612.41 = 644.46 : x
2. Step 2: Convert to fraction form
   1,168.41/1,612.41 = 644.46/x
3. Step 3: Cross multiply
   1,168.41x = 1,612.41 × 644.46
4. Step 4: Simplify right side
   1,168.41x = 1,039,125.69
5. Step 5: Solve for x
   x = 1,039,125.69/1,168.41
6. Step 6: Final answer
   x = 889.35