Finding the Fourth Proportional to 72.82, 109.25 and 27.18

Step by Step Solution

1. Step 1: Write the proportion equation
   72.82 : 109.25 = 27.18 : x
2. Step 2: Convert to fraction form
   72.82/109.25 = 27.18/x
3. Step 3: Cross multiply
   72.82x = 109.25 × 27.18
4. Step 4: Simplify right side
   72.82x = 2,969.42
5. Step 5: Solve for x
   x = 2,969.42/72.82
6. Step 6: Final answer
   x = 40.78