Finding the Fourth Proportional to 67.76, 101.40 and 53.25

Step by Step Solution

1. Step 1: Write the proportion equation
   67.76 : 101.40 = 53.25 : x
2. Step 2: Convert to fraction form
   67.76/101.40 = 53.25/x
3. Step 3: Cross multiply
   67.76x = 101.40 × 53.25
4. Step 4: Simplify right side
   67.76x = 5,399.55
5. Step 5: Solve for x
   x = 5,399.55/67.76
6. Step 6: Final answer
   x = 79.69