Finding the Fourth Proportional to 196.72, 271.49 and 109.42

Step by Step Solution

1. Step 1: Write the proportion equation
   196.72 : 271.49 = 109.42 : x
2. Step 2: Convert to fraction form
   196.72/271.49 = 109.42/x
3. Step 3: Cross multiply
   196.72x = 271.49 × 109.42
4. Step 4: Simplify right side
   196.72x = 29,704.53
5. Step 5: Solve for x
   x = 29,704.53/196.72
6. Step 6: Final answer
   x = 151.00