Finding the Fourth Proportional to 142.39, 196.48 and 83.37

Step by Step Solution

1. Step 1: Write the proportion equation
   142.39 : 196.48 = 83.37 : x
2. Step 2: Convert to fraction form
   142.39/196.48 = 83.37/x
3. Step 3: Cross multiply
   142.39x = 196.48 × 83.37
4. Step 4: Simplify right side
   142.39x = 16,379.56
5. Step 5: Solve for x
   x = 16,379.56/142.39
6. Step 6: Final answer
   x = 115.04