Finding the Fourth Proportional to 142.46, 196.72 and 113.48

Step by Step Solution

1. Step 1: Write the proportion equation
   142.46 : 196.72 = 113.48 : x
2. Step 2: Convert to fraction form
   142.46/196.72 = 113.48/x
3. Step 3: Cross multiply
   142.46x = 196.72 × 113.48
4. Step 4: Simplify right side
   142.46x = 22,323.79
5. Step 5: Solve for x
   x = 22,323.79/142.46
6. Step 6: Final answer
   x = 156.70