Finding the Fourth Proportional to 67.69, 101.61 and 54.17

Step by Step Solution

1. Step 1: Write the proportion equation
   67.69 : 101.61 = 54.17 : x
2. Step 2: Convert to fraction form
   67.69/101.61 = 54.17/x
3. Step 3: Cross multiply
   67.69x = 101.61 × 54.17
4. Step 4: Simplify right side
   67.69x = 5,503.43
5. Step 5: Solve for x
   x = 5,503.43/67.69
6. Step 6: Final answer
   x = 81.31