Finding the Fourth Proportional to 12.18, 18.17 and 10.83

Step by Step Solution

1. Step 1: Write the proportion equation
   12.18 : 18.17 = 10.83 : x
2. Step 2: Convert to fraction form
   12.18/18.17 = 10.83/x
3. Step 3: Cross multiply
   12.18x = 18.17 × 10.83
4. Step 4: Simplify right side
   12.18x = 196.78
5. Step 5: Solve for x
   x = 196.78/12.18
6. Step 6: Final answer
   x = 16.16