Finding the Fourth Proportional to 81.08, 111.98 and 53.54

Step by Step Solution

1. Step 1: Write the proportion equation
   81.08 : 111.98 = 53.54 : x
2. Step 2: Convert to fraction form
   81.08/111.98 = 53.54/x
3. Step 3: Cross multiply
   81.08x = 111.98 × 53.54
4. Step 4: Simplify right side
   81.08x = 5,995.82
5. Step 5: Solve for x
   x = 5,995.82/81.08
6. Step 6: Final answer
   x = 73.95