Finding the Fourth Proportional to 3,205.78, 4,803.71 and 2,162.09

Step by Step Solution

1. Step 1: Write the proportion equation
   3,205.78 : 4,803.71 = 2,162.09 : x
2. Step 2: Convert to fraction form
   3,205.78/4,803.71 = 2,162.09/x
3. Step 3: Cross multiply
   3,205.78x = 4,803.71 × 2,162.09
4. Step 4: Simplify right side
   3,205.78x = 10,386,054.55
5. Step 5: Solve for x
   x = 10,386,054.55/3,205.78
6. Step 6: Final answer
   x = 3,239.79