Finding the Fourth Proportional to 196.72, 271.56 and 153.28

Step by Step Solution

1. Step 1: Write the proportion equation
   196.72 : 271.56 = 153.28 : x
2. Step 2: Convert to fraction form
   196.72/271.56 = 153.28/x
3. Step 3: Cross multiply
   196.72x = 271.56 × 153.28
4. Step 4: Simplify right side
   196.72x = 41,624.72
5. Step 5: Solve for x
   x = 41,624.72/196.72
6. Step 6: Final answer
   x = 211.59