Finding the Fourth Proportional to 196.80, 270.72 and 162.24

Step by Step Solution

1. Step 1: Write the proportion equation
   196.80 : 270.72 = 162.24 : x
2. Step 2: Convert to fraction form
   196.80/270.72 = 162.24/x
3. Step 3: Cross multiply
   196.80x = 270.72 × 162.24
4. Step 4: Simplify right side
   196.80x = 43,921.61
5. Step 5: Solve for x
   x = 43,921.61/196.80
6. Step 6: Final answer
   x = 223.18