Finding the Fourth Proportional to 67.38, 100.98 and 53.88

Step by Step Solution

1. Step 1: Write the proportion equation
   67.38 : 100.98 = 53.88 : x
2. Step 2: Convert to fraction form
   67.38/100.98 = 53.88/x
3. Step 3: Cross multiply
   67.38x = 100.98 × 53.88
4. Step 4: Simplify right side
   67.38x = 5,440.80
5. Step 5: Solve for x
   x = 5,440.80/67.38
6. Step 6: Final answer
   x = 80.75