Finding the Fourth Proportional to 196.76, 271.55 and 113.87

Step by Step Solution

1. Step 1: Write the proportion equation
   196.76 : 271.55 = 113.87 : x
2. Step 2: Convert to fraction form
   196.76/271.55 = 113.87/x
3. Step 3: Cross multiply
   196.76x = 271.55 × 113.87
4. Step 4: Simplify right side
   196.76x = 30,920.33
5. Step 5: Solve for x
   x = 30,920.33/196.76
6. Step 6: Final answer
   x = 157.15