Finding the Fourth Proportional to 2,640.33, 3,643.61 and 1,521.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,640.33 : 3,643.61 = 1,521.27 : x
2. Step 2: Convert to fraction form
   2,640.33/3,643.61 = 1,521.27/x
3. Step 3: Cross multiply
   2,640.33x = 3,643.61 × 1,521.27
4. Step 4: Simplify right side
   2,640.33x = 5,542,914.58
5. Step 5: Solve for x
   x = 5,542,914.58/2,640.33
6. Step 6: Final answer
   x = 2,099.33