Finding the Fourth Proportional to 1,096.82, 1,645.25 and 447.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,096.82 : 1,645.25 = 447.15 : x
2. Step 2: Convert to fraction form
   1,096.82/1,645.25 = 447.15/x
3. Step 3: Cross multiply
   1,096.82x = 1,645.25 × 447.15
4. Step 4: Simplify right side
   1,096.82x = 735,671.30
5. Step 5: Solve for x
   x = 735,671.30/1,096.82
6. Step 6: Final answer
   x = 670.73