Finding the Fourth Proportional to 142.42, 196.52 and 83.41

Step by Step Solution

1. Step 1: Write the proportion equation
   142.42 : 196.52 = 83.41 : x
2. Step 2: Convert to fraction form
   142.42/196.52 = 83.41/x
3. Step 3: Cross multiply
   142.42x = 196.52 × 83.41
4. Step 4: Simplify right side
   142.42x = 16,391.73
5. Step 5: Solve for x
   x = 16,391.73/142.42
6. Step 6: Final answer
   x = 115.09