Finding the Fourth Proportional to 67.01, 100.55 and 54.25

Step by Step Solution

1. Step 1: Write the proportion equation
   67.01 : 100.55 = 54.25 : x
2. Step 2: Convert to fraction form
   67.01/100.55 = 54.25/x
3. Step 3: Cross multiply
   67.01x = 100.55 × 54.25
4. Step 4: Simplify right side
   67.01x = 5,454.06
5. Step 5: Solve for x
   x = 5,454.06/67.01
6. Step 6: Final answer
   x = 81.39