Finding the Fourth Proportional to 196.67, 271.33 and 126.72

Step by Step Solution

1. Step 1: Write the proportion equation
   196.67 : 271.33 = 126.72 : x
2. Step 2: Convert to fraction form
   196.67/271.33 = 126.72/x
3. Step 3: Cross multiply
   196.67x = 271.33 × 126.72
4. Step 4: Simplify right side
   196.67x = 34,382.94
5. Step 5: Solve for x
   x = 34,382.94/196.67
6. Step 6: Final answer
   x = 174.83