Finding the Fourth Proportional to 1,096.72, 1,645.56 and 447.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,096.72 : 1,645.56 = 447.88 : x
2. Step 2: Convert to fraction form
   1,096.72/1,645.56 = 447.88/x
3. Step 3: Cross multiply
   1,096.72x = 1,645.56 × 447.88
4. Step 4: Simplify right side
   1,096.72x = 737,013.41
5. Step 5: Solve for x
   x = 737,013.41/1,096.72
6. Step 6: Final answer
   x = 672.02