Finding the Fourth Proportional to 142.28, 196.34 and 83.25

Step by Step Solution

1. Step 1: Write the proportion equation
   142.28 : 196.34 = 83.25 : x
2. Step 2: Convert to fraction form
   142.28/196.34 = 83.25/x
3. Step 3: Cross multiply
   142.28x = 196.34 × 83.25
4. Step 4: Simplify right side
   142.28x = 16,345.17
5. Step 5: Solve for x
   x = 16,345.17/142.28
6. Step 6: Final answer
   x = 114.88