Finding the Fourth Proportional to 1,096.56, 1,644.72 and 327.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,096.56 : 1,644.72 = 327.12 : x
2. Step 2: Convert to fraction form
   1,096.56/1,644.72 = 327.12/x
3. Step 3: Cross multiply
   1,096.56x = 1,644.72 × 327.12
4. Step 4: Simplify right side
   1,096.56x = 538,020.81
5. Step 5: Solve for x
   x = 538,020.81/1,096.56
6. Step 6: Final answer
   x = 490.64