Finding the Fourth Proportional to 142.16, 196.18 and 83.16

Step by Step Solution

1. Step 1: Write the proportion equation
   142.16 : 196.18 = 83.16 : x
2. Step 2: Convert to fraction form
   142.16/196.18 = 83.16/x
3. Step 3: Cross multiply
   142.16x = 196.18 × 83.16
4. Step 4: Simplify right side
   142.16x = 16,314.33
5. Step 5: Solve for x
   x = 16,314.33/142.16
6. Step 6: Final answer
   x = 114.76