Finding the Fourth Proportional to 142.59, 196.88 and 109.48

Step by Step Solution

1. Step 1: Write the proportion equation
   142.59 : 196.88 = 109.48 : x
2. Step 2: Convert to fraction form
   142.59/196.88 = 109.48/x
3. Step 3: Cross multiply
   142.59x = 196.88 × 109.48
4. Step 4: Simplify right side
   142.59x = 21,554.42
5. Step 5: Solve for x
   x = 21,554.42/142.59
6. Step 6: Final answer
   x = 151.16