Finding the Fourth Proportional to 142.18, 196.08 and 111.10

Step by Step Solution

1. Step 1: Write the proportion equation
   142.18 : 196.08 = 111.10 : x
2. Step 2: Convert to fraction form
   142.18/196.08 = 111.10/x
3. Step 3: Cross multiply
   142.18x = 196.08 × 111.10
4. Step 4: Simplify right side
   142.18x = 21,784.49
5. Step 5: Solve for x
   x = 21,784.49/142.18
6. Step 6: Final answer
   x = 153.22