Finding the Fourth Proportional to 2,640.73, 3,643.14 and 1,521.06

Step by Step Solution

1. Step 1: Write the proportion equation
   2,640.73 : 3,643.14 = 1,521.06 : x
2. Step 2: Convert to fraction form
   2,640.73/3,643.14 = 1,521.06/x
3. Step 3: Cross multiply
   2,640.73x = 3,643.14 × 1,521.06
4. Step 4: Simplify right side
   2,640.73x = 5,541,444.48
5. Step 5: Solve for x
   x = 5,541,444.48/2,640.73
6. Step 6: Final answer
   x = 2,098.45