Finding the Fourth Proportional to 1,309.82, 1,963.48 and 443.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,309.82 : 1,963.48 = 443.50 : x
2. Step 2: Convert to fraction form
   1,309.82/1,963.48 = 443.50/x
3. Step 3: Cross multiply
   1,309.82x = 1,963.48 × 443.50
4. Step 4: Simplify right side
   1,309.82x = 870,803.38
5. Step 5: Solve for x
   x = 870,803.38/1,309.82
6. Step 6: Final answer
   x = 664.83