Finding the Fourth Proportional to 3,820.81, 5,723.83 and 2,818.39

Step by Step Solution

1. Step 1: Write the proportion equation
   3,820.81 : 5,723.83 = 2,818.39 : x
2. Step 2: Convert to fraction form
   3,820.81/5,723.83 = 2,818.39/x
3. Step 3: Cross multiply
   3,820.81x = 5,723.83 × 2,818.39
4. Step 4: Simplify right side
   3,820.81x = 16,131,949.57
5. Step 5: Solve for x
   x = 16,131,949.57/3,820.81
6. Step 6: Final answer
   x = 4,222.13