Finding the Fourth Proportional to 2,640.12, 3,642.82 and 1,521.04

Step by Step Solution

1. Step 1: Write the proportion equation
   2,640.12 : 3,642.82 = 1,521.04 : x
2. Step 2: Convert to fraction form
   2,640.12/3,642.82 = 1,521.04/x
3. Step 3: Cross multiply
   2,640.12x = 3,642.82 × 1,521.04
4. Step 4: Simplify right side
   2,640.12x = 5,540,874.93
5. Step 5: Solve for x
   x = 5,540,874.93/2,640.12
6. Step 6: Final answer
   x = 2,098.72