Finding the Fourth Proportional to 67.34, 100.88 and 54.42

Step by Step Solution

1. Step 1: Write the proportion equation
   67.34 : 100.88 = 54.42 : x
2. Step 2: Convert to fraction form
   67.34/100.88 = 54.42/x
3. Step 3: Cross multiply
   67.34x = 100.88 × 54.42
4. Step 4: Simplify right side
   67.34x = 5,489.89
5. Step 5: Solve for x
   x = 5,489.89/67.34
6. Step 6: Final answer
   x = 81.52