Finding the Fourth Proportional to 2,640.16, 3,643.92 and 1,536.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,640.16 : 3,643.92 = 1,536.16 : x
2. Step 2: Convert to fraction form
   2,640.16/3,643.92 = 1,536.16/x
3. Step 3: Cross multiply
   2,640.16x = 3,643.92 × 1,536.16
4. Step 4: Simplify right side
   2,640.16x = 5,597,644.15
5. Step 5: Solve for x
   x = 5,597,644.15/2,640.16
6. Step 6: Final answer
   x = 2,120.19