Finding the Fourth Proportional to 196.95, 271.79 and 111.78

Step by Step Solution

1. Step 1: Write the proportion equation
   196.95 : 271.79 = 111.78 : x
2. Step 2: Convert to fraction form
   196.95/271.79 = 111.78/x
3. Step 3: Cross multiply
   196.95x = 271.79 × 111.78
4. Step 4: Simplify right side
   196.95x = 30,380.69
5. Step 5: Solve for x
   x = 30,380.69/196.95
6. Step 6: Final answer
   x = 154.26