Finding the Fourth Proportional to 67.50, 100.95 and 53.82

Step by Step Solution

1. Step 1: Write the proportion equation
   67.50 : 100.95 = 53.82 : x
2. Step 2: Convert to fraction form
   67.50/100.95 = 53.82/x
3. Step 3: Cross multiply
   67.50x = 100.95 × 53.82
4. Step 4: Simplify right side
   67.50x = 5,433.13
5. Step 5: Solve for x
   x = 5,433.13/67.50
6. Step 6: Final answer
   x = 80.49