Finding the Fourth Proportional to 105.71, 158.47 and 67.08

Step by Step Solution

1. Step 1: Write the proportion equation
   105.71 : 158.47 = 67.08 : x
2. Step 2: Convert to fraction form
   105.71/158.47 = 67.08/x
3. Step 3: Cross multiply
   105.71x = 158.47 × 67.08
4. Step 4: Simplify right side
   105.71x = 10,630.08
5. Step 5: Solve for x
   x = 10,630.08/105.71
6. Step 6: Final answer
   x = 100.56