Finding the Fourth Proportional to 196.72, 271.40 and 113.80

Step by Step Solution

1. Step 1: Write the proportion equation
   196.72 : 271.40 = 113.80 : x
2. Step 2: Convert to fraction form
   196.72/271.40 = 113.80/x
3. Step 3: Cross multiply
   196.72x = 271.40 × 113.80
4. Step 4: Simplify right side
   196.72x = 30,885.32
5. Step 5: Solve for x
   x = 30,885.32/196.72
6. Step 6: Final answer
   x = 157.00