Finding the Fourth Proportional to 67.74, 101.72 and 53.34

Step by Step Solution

1. Step 1: Write the proportion equation
   67.74 : 101.72 = 53.34 : x
2. Step 2: Convert to fraction form
   67.74/101.72 = 53.34/x
3. Step 3: Cross multiply
   67.74x = 101.72 × 53.34
4. Step 4: Simplify right side
   67.74x = 5,425.74
5. Step 5: Solve for x
   x = 5,425.74/67.74
6. Step 6: Final answer
   x = 80.10