Finding the Fourth Proportional to 196.17, 270.69 and 113.28

Step by Step Solution

1. Step 1: Write the proportion equation
   196.17 : 270.69 = 113.28 : x
2. Step 2: Convert to fraction form
   196.17/270.69 = 113.28/x
3. Step 3: Cross multiply
   196.17x = 270.69 × 113.28
4. Step 4: Simplify right side
   196.17x = 30,663.76
5. Step 5: Solve for x
   x = 30,663.76/196.17
6. Step 6: Final answer
   x = 156.31