Finding the Fourth Proportional to 142.29, 196.37 and 83.28

Step by Step Solution

1. Step 1: Write the proportion equation
   142.29 : 196.37 = 83.28 : x
2. Step 2: Convert to fraction form
   142.29/196.37 = 83.28/x
3. Step 3: Cross multiply
   142.29x = 196.37 × 83.28
4. Step 4: Simplify right side
   142.29x = 16,353.69
5. Step 5: Solve for x
   x = 16,353.69/142.29
6. Step 6: Final answer
   x = 114.93