Finding the Fourth Proportional to 142.56, 196.81 and 96.18

Step by Step Solution

1. Step 1: Write the proportion equation
   142.56 : 196.81 = 96.18 : x
2. Step 2: Convert to fraction form
   142.56/196.81 = 96.18/x
3. Step 3: Cross multiply
   142.56x = 196.81 × 96.18
4. Step 4: Simplify right side
   142.56x = 18,927.72
5. Step 5: Solve for x
   x = 18,927.72/142.56
6. Step 6: Final answer
   x = 132.77