Finding the Fourth Proportional to 3,843.36, 5,753.28 and 2,106.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,843.36 : 5,753.28 = 2,106.72 : x
2. Step 2: Convert to fraction form
   3,843.36/5,753.28 = 2,106.72/x
3. Step 3: Cross multiply
   3,843.36x = 5,753.28 × 2,106.72
4. Step 4: Simplify right side
   3,843.36x = 12,120,550.04
5. Step 5: Solve for x
   x = 12,120,550.04/3,843.36
6. Step 6: Final answer
   x = 3,153.63