Finding the Fourth Proportional to 6,818.22, 10,217.85 and 3,111.18

Step by Step Solution

1. Step 1: Write the proportion equation
   6,818.22 : 10,217.85 = 3,111.18 : x
2. Step 2: Convert to fraction form
   6,818.22/10,217.85 = 3,111.18/x
3. Step 3: Cross multiply
   6,818.22x = 10,217.85 × 3,111.18
4. Step 4: Simplify right side
   6,818.22x = 31,789,570.56
5. Step 5: Solve for x
   x = 31,789,570.56/6,818.22
6. Step 6: Final answer
   x = 4,662.44