Finding the Fourth Proportional to 196.62, 271.32 and 113.72

Step by Step Solution

1. Step 1: Write the proportion equation
   196.62 : 271.32 = 113.72 : x
2. Step 2: Convert to fraction form
   196.62/271.32 = 113.72/x
3. Step 3: Cross multiply
   196.62x = 271.32 × 113.72
4. Step 4: Simplify right side
   196.62x = 30,854.17
5. Step 5: Solve for x
   x = 30,854.17/196.62
6. Step 6: Final answer
   x = 156.93