Finding the Fourth Proportional to 6.78, 10.18 and 3.22

Step by Step Solution

1. Step 1: Write the proportion equation
   6.78 : 10.18 = 3.22 : x
2. Step 2: Convert to fraction form
   6.78/10.18 = 3.22/x
3. Step 3: Cross multiply
   6.78x = 10.18 × 3.22
4. Step 4: Simplify right side
   6.78x = 32.76
5. Step 5: Solve for x
   x = 32.76/6.78
6. Step 6: Final answer
   x = 4.83