Finding the Fourth Proportional to 142.54, 196.69 and 83.51

Step by Step Solution

1. Step 1: Write the proportion equation
   142.54 : 196.69 = 83.51 : x
2. Step 2: Convert to fraction form
   142.54/196.69 = 83.51/x
3. Step 3: Cross multiply
   142.54x = 196.69 × 83.51
4. Step 4: Simplify right side
   142.54x = 16,425.58
5. Step 5: Solve for x
   x = 16,425.58/142.54
6. Step 6: Final answer
   x = 115.23