Finding the Fourth Proportional to 196.17, 270.72 and 113.28

Step by Step Solution

1. Step 1: Write the proportion equation
   196.17 : 270.72 = 113.28 : x
2. Step 2: Convert to fraction form
   196.17/270.72 = 113.28/x
3. Step 3: Cross multiply
   196.17x = 270.72 × 113.28
4. Step 4: Simplify right side
   196.17x = 30,667.56
5. Step 5: Solve for x
   x = 30,667.56/196.17
6. Step 6: Final answer
   x = 156.33