Finding the Fourth Proportional to 142.55, 196.57 and 111.41

Step by Step Solution

1. Step 1: Write the proportion equation
   142.55 : 196.57 = 111.41 : x
2. Step 2: Convert to fraction form
   142.55/196.57 = 111.41/x
3. Step 3: Cross multiply
   142.55x = 196.57 × 111.41
4. Step 4: Simplify right side
   142.55x = 21,899.86
5. Step 5: Solve for x
   x = 21,899.86/142.55
6. Step 6: Final answer
   x = 153.63