Finding the Fourth Proportional to 1,308.96, 1,963.71 and 443.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,308.96 : 1,963.71 = 443.25 : x
2. Step 2: Convert to fraction form
   1,308.96/1,963.71 = 443.25/x
3. Step 3: Cross multiply
   1,308.96x = 1,963.71 × 443.25
4. Step 4: Simplify right side
   1,308.96x = 870,414.46
5. Step 5: Solve for x
   x = 870,414.46/1,308.96
6. Step 6: Final answer
   x = 664.97