Finding the Fourth Proportional to 196.72, 271.45 and 113.77

Step by Step Solution

1. Step 1: Write the proportion equation
   196.72 : 271.45 = 113.77 : x
2. Step 2: Convert to fraction form
   196.72/271.45 = 113.77/x
3. Step 3: Cross multiply
   196.72x = 271.45 × 113.77
4. Step 4: Simplify right side
   196.72x = 30,882.87
5. Step 5: Solve for x
   x = 30,882.87/196.72
6. Step 6: Final answer
   x = 156.99