Finding the Fourth Proportional to 2,640.24, 3,643.43 and 1,445.22

Step by Step Solution

1. Step 1: Write the proportion equation
   2,640.24 : 3,643.43 = 1,445.22 : x
2. Step 2: Convert to fraction form
   2,640.24/3,643.43 = 1,445.22/x
3. Step 3: Cross multiply
   2,640.24x = 3,643.43 × 1,445.22
4. Step 4: Simplify right side
   2,640.24x = 5,265,550.68
5. Step 5: Solve for x
   x = 5,265,550.68/2,640.24
6. Step 6: Final answer
   x = 1,994.35