Finding the Fourth Proportional to 105.66, 158.71 and 67.23

Step by Step Solution

1. Step 1: Write the proportion equation
   105.66 : 158.71 = 67.23 : x
2. Step 2: Convert to fraction form
   105.66/158.71 = 67.23/x
3. Step 3: Cross multiply
   105.66x = 158.71 × 67.23
4. Step 4: Simplify right side
   105.66x = 10,670.64
5. Step 5: Solve for x
   x = 10,670.64/105.66
6. Step 6: Final answer
   x = 100.99