Finding the Fourth Proportional to 196.67, 271.39 and 108.15

Step by Step Solution

1. Step 1: Write the proportion equation
   196.67 : 271.39 = 108.15 : x
2. Step 2: Convert to fraction form
   196.67/271.39 = 108.15/x
3. Step 3: Cross multiply
   196.67x = 271.39 × 108.15
4. Step 4: Simplify right side
   196.67x = 29,350.83
5. Step 5: Solve for x
   x = 29,350.83/196.67
6. Step 6: Final answer
   x = 149.24