Finding the Fourth Proportional to 1,096.31, 1,644.27 and 326.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,096.31 : 1,644.27 = 326.63 : x
2. Step 2: Convert to fraction form
   1,096.31/1,644.27 = 326.63/x
3. Step 3: Cross multiply
   1,096.31x = 1,644.27 × 326.63
4. Step 4: Simplify right side
   1,096.31x = 537,067.91
5. Step 5: Solve for x
   x = 537,067.91/1,096.31
6. Step 6: Final answer
   x = 489.89