Finding the Fourth Proportional to 105.96, 158.98 and 67.02

Step by Step Solution

1. Step 1: Write the proportion equation
   105.96 : 158.98 = 67.02 : x
2. Step 2: Convert to fraction form
   105.96/158.98 = 67.02/x
3. Step 3: Cross multiply
   105.96x = 158.98 × 67.02
4. Step 4: Simplify right side
   105.96x = 10,654.84
5. Step 5: Solve for x
   x = 10,654.84/105.96
6. Step 6: Final answer
   x = 100.56