Finding the Fourth Proportional to 2,640.37, 3,643.69 and 1,520.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,640.37 : 3,643.69 = 1,520.89 : x
2. Step 2: Convert to fraction form
   2,640.37/3,643.69 = 1,520.89/x
3. Step 3: Cross multiply
   2,640.37x = 3,643.69 × 1,520.89
4. Step 4: Simplify right side
   2,640.37x = 5,541,651.68
5. Step 5: Solve for x
   x = 5,541,651.68/2,640.37
6. Step 6: Final answer
   x = 2,098.82