Finding the Fourth Proportional to 1,096.96, 1,646.48 and 404.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,096.96 : 1,646.48 = 404.30 : x
2. Step 2: Convert to fraction form
   1,096.96/1,646.48 = 404.30/x
3. Step 3: Cross multiply
   1,096.96x = 1,646.48 × 404.30
4. Step 4: Simplify right side
   1,096.96x = 665,664.64
5. Step 5: Solve for x
   x = 665,664.64/1,096.96
6. Step 6: Final answer
   x = 606.83