Finding the Fourth Proportional to 67.29, 100.85 and 28.76

Step by Step Solution

1. Step 1: Write the proportion equation
   67.29 : 100.85 = 28.76 : x
2. Step 2: Convert to fraction form
   67.29/100.85 = 28.76/x
3. Step 3: Cross multiply
   67.29x = 100.85 × 28.76
4. Step 4: Simplify right side
   67.29x = 2,899.94
5. Step 5: Solve for x
   x = 2,899.94/67.29
6. Step 6: Final answer
   x = 43.10