Finding the Fourth Proportional to 67.82, 101.69 and 27.21

Step by Step Solution

1. Step 1: Write the proportion equation
   67.82 : 101.69 = 27.21 : x
2. Step 2: Convert to fraction form
   67.82/101.69 = 27.21/x
3. Step 3: Cross multiply
   67.82x = 101.69 × 27.21
4. Step 4: Simplify right side
   67.82x = 2,767.16
5. Step 5: Solve for x
   x = 2,767.16/67.82
6. Step 6: Final answer
   x = 40.80