Finding the Fourth Proportional to 142.48, 196.59 and 83.48

Step by Step Solution

1. Step 1: Write the proportion equation
   142.48 : 196.59 = 83.48 : x
2. Step 2: Convert to fraction form
   142.48/196.59 = 83.48/x
3. Step 3: Cross multiply
   142.48x = 196.59 × 83.48
4. Step 4: Simplify right side
   142.48x = 16,411.33
5. Step 5: Solve for x
   x = 16,411.33/142.48
6. Step 6: Final answer
   x = 115.18