Finding the Fourth Proportional to 108.27, 149.38 and 71.42

Step by Step Solution

1. Step 1: Write the proportion equation
   108.27 : 149.38 = 71.42 : x
2. Step 2: Convert to fraction form
   108.27/149.38 = 71.42/x
3. Step 3: Cross multiply
   108.27x = 149.38 × 71.42
4. Step 4: Simplify right side
   108.27x = 10,667.79
5. Step 5: Solve for x
   x = 10,667.79/108.27
6. Step 6: Final answer
   x = 98.53