Finding the Fourth Proportional to 67.81, 101.50 and 53.23

Step by Step Solution

1. Step 1: Write the proportion equation
   67.81 : 101.50 = 53.23 : x
2. Step 2: Convert to fraction form
   67.81/101.50 = 53.23/x
3. Step 3: Cross multiply
   67.81x = 101.50 × 53.23
4. Step 4: Simplify right side
   67.81x = 5,402.85
5. Step 5: Solve for x
   x = 5,402.85/67.81
6. Step 6: Final answer
   x = 79.68