Finding the Fourth Proportional to 105.86, 158.61 and 67.33

Step by Step Solution

1. Step 1: Write the proportion equation
   105.86 : 158.61 = 67.33 : x
2. Step 2: Convert to fraction form
   105.86/158.61 = 67.33/x
3. Step 3: Cross multiply
   105.86x = 158.61 × 67.33
4. Step 4: Simplify right side
   105.86x = 10,679.28
5. Step 5: Solve for x
   x = 10,679.28/105.86
6. Step 6: Final answer
   x = 100.88