Finding the Fourth Proportional to 67.68, 101.43 and 53.24

Step by Step Solution

1. Step 1: Write the proportion equation
   67.68 : 101.43 = 53.24 : x
2. Step 2: Convert to fraction form
   67.68/101.43 = 53.24/x
3. Step 3: Cross multiply
   67.68x = 101.43 × 53.24
4. Step 4: Simplify right side
   67.68x = 5,399.63
5. Step 5: Solve for x
   x = 5,399.63/67.68
6. Step 6: Final answer
   x = 79.78