Finding the Fourth Proportional to 2,640.30, 3,643.28 and 1,520.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,640.30 : 3,643.28 = 1,520.98 : x
2. Step 2: Convert to fraction form
   2,640.30/3,643.28 = 1,520.98/x
3. Step 3: Cross multiply
   2,640.30x = 3,643.28 × 1,520.98
4. Step 4: Simplify right side
   2,640.30x = 5,541,356.01
5. Step 5: Solve for x
   x = 5,541,356.01/2,640.30
6. Step 6: Final answer
   x = 2,098.76