Finding the Fourth Proportional to 3,846.36, 5,757.78 and 2,109.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,846.36 : 5,757.78 = 2,109.72 : x
2. Step 2: Convert to fraction form
   3,846.36/5,757.78 = 2,109.72/x
3. Step 3: Cross multiply
   3,846.36x = 5,757.78 × 2,109.72
4. Step 4: Simplify right side
   3,846.36x = 12,147,303.62
5. Step 5: Solve for x
   x = 12,147,303.62/3,846.36
6. Step 6: Final answer
   x = 3,158.13