Finding the Fourth Proportional to 1,096.90, 1,644.59 and 403.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,096.90 : 1,644.59 = 403.47 : x
2. Step 2: Convert to fraction form
   1,096.90/1,644.59 = 403.47/x
3. Step 3: Cross multiply
   1,096.90x = 1,644.59 × 403.47
4. Step 4: Simplify right side
   1,096.90x = 663,540.71
5. Step 5: Solve for x
   x = 663,540.71/1,096.90
6. Step 6: Final answer
   x = 604.93