Finding the Fourth Proportional to 1,308.56, 1,962.82 and 443.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,308.56 : 1,962.82 = 443.48 : x
2. Step 2: Convert to fraction form
   1,308.56/1,962.82 = 443.48/x
3. Step 3: Cross multiply
   1,308.56x = 1,962.82 × 443.48
4. Step 4: Simplify right side
   1,308.56x = 870,471.41
5. Step 5: Solve for x
   x = 870,471.41/1,308.56
6. Step 6: Final answer
   x = 665.21