Finding the Fourth Proportional to 118.14, 162.72 and 108.42

Step by Step Solution

1. Step 1: Write the proportion equation
   118.14 : 162.72 = 108.42 : x
2. Step 2: Convert to fraction form
   118.14/162.72 = 108.42/x
3. Step 3: Cross multiply
   118.14x = 162.72 × 108.42
4. Step 4: Simplify right side
   118.14x = 17,642.10
5. Step 5: Solve for x
   x = 17,642.10/118.14
6. Step 6: Final answer
   x = 149.33