Finding the Fourth Proportional to 67.29, 100.96 and 30.72

Step by Step Solution

1. Step 1: Write the proportion equation
   67.29 : 100.96 = 30.72 : x
2. Step 2: Convert to fraction form
   67.29/100.96 = 30.72/x
3. Step 3: Cross multiply
   67.29x = 100.96 × 30.72
4. Step 4: Simplify right side
   67.29x = 3,101.49
5. Step 5: Solve for x
   x = 3,101.49/67.29
6. Step 6: Final answer
   x = 46.09