Finding the Fourth Proportional to 80.81, 111.52 and 46.31

Step by Step Solution

1. Step 1: Write the proportion equation
   80.81 : 111.52 = 46.31 : x
2. Step 2: Convert to fraction form
   80.81/111.52 = 46.31/x
3. Step 3: Cross multiply
   80.81x = 111.52 × 46.31
4. Step 4: Simplify right side
   80.81x = 5,164.83
5. Step 5: Solve for x
   x = 5,164.83/80.81
6. Step 6: Final answer
   x = 63.91