Finding the Fourth Proportional to 196.79, 271.57 and 113.89

Step by Step Solution

1. Step 1: Write the proportion equation
   196.79 : 271.57 = 113.89 : x
2. Step 2: Convert to fraction form
   196.79/271.57 = 113.89/x
3. Step 3: Cross multiply
   196.79x = 271.57 × 113.89
4. Step 4: Simplify right side
   196.79x = 30,929.11
5. Step 5: Solve for x
   x = 30,929.11/196.79
6. Step 6: Final answer
   x = 157.17