Finding the Fourth Proportional to 71.27, 106.83 and 42.43

Step by Step Solution

1. Step 1: Write the proportion equation
   71.27 : 106.83 = 42.43 : x
2. Step 2: Convert to fraction form
   71.27/106.83 = 42.43/x
3. Step 3: Cross multiply
   71.27x = 106.83 × 42.43
4. Step 4: Simplify right side
   71.27x = 4,532.53
5. Step 5: Solve for x
   x = 4,532.53/71.27
6. Step 6: Final answer
   x = 63.59