Finding the Fourth Proportional to 67.91, 101.79 and 54.32

Step by Step Solution

1. Step 1: Write the proportion equation
   67.91 : 101.79 = 54.32 : x
2. Step 2: Convert to fraction form
   67.91/101.79 = 54.32/x
3. Step 3: Cross multiply
   67.91x = 101.79 × 54.32
4. Step 4: Simplify right side
   67.91x = 5,528.72
5. Step 5: Solve for x
   x = 5,528.72/67.91
6. Step 6: Final answer
   x = 81.42