Finding the Fourth Proportional to 2,643.25, 3,647.68 and 1,448.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,643.25 : 3,647.68 = 1,448.31 : x
2. Step 2: Convert to fraction form
   2,643.25/3,647.68 = 1,448.31/x
3. Step 3: Cross multiply
   2,643.25x = 3,647.68 × 1,448.31
4. Step 4: Simplify right side
   2,643.25x = 5,282,963.68
5. Step 5: Solve for x
   x = 5,282,963.68/2,643.25
6. Step 6: Final answer
   x = 1,998.66