Finding the Fourth Proportional to 105.69, 158.52 and 67.17

Step by Step Solution

1. Step 1: Write the proportion equation
   105.69 : 158.52 = 67.17 : x
2. Step 2: Convert to fraction form
   105.69/158.52 = 67.17/x
3. Step 3: Cross multiply
   105.69x = 158.52 × 67.17
4. Step 4: Simplify right side
   105.69x = 10,647.79
5. Step 5: Solve for x
   x = 10,647.79/105.69
6. Step 6: Final answer
   x = 100.75