Finding the Fourth Proportional to 1,096.91, 1,645.38 and 448.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,096.91 : 1,645.38 = 448.10 : x
2. Step 2: Convert to fraction form
   1,096.91/1,645.38 = 448.10/x
3. Step 3: Cross multiply
   1,096.91x = 1,645.38 × 448.10
4. Step 4: Simplify right side
   1,096.91x = 737,286.55
5. Step 5: Solve for x
   x = 737,286.55/1,096.91
6. Step 6: Final answer
   x = 672.15