Finding the Fourth Proportional to 71.14, 106.73 and 42.27

Step by Step Solution

1. Step 1: Write the proportion equation
   71.14 : 106.73 = 42.27 : x
2. Step 2: Convert to fraction form
   71.14/106.73 = 42.27/x
3. Step 3: Cross multiply
   71.14x = 106.73 × 42.27
4. Step 4: Simplify right side
   71.14x = 4,511.42
5. Step 5: Solve for x
   x = 4,511.42/71.14
6. Step 6: Final answer
   x = 63.42