Finding the Fourth Proportional to 111.60, 167.31 and 53.82

Step by Step Solution

1. Step 1: Write the proportion equation
   111.60 : 167.31 = 53.82 : x
2. Step 2: Convert to fraction form
   111.60/167.31 = 53.82/x
3. Step 3: Cross multiply
   111.60x = 167.31 × 53.82
4. Step 4: Simplify right side
   111.60x = 9,004.62
5. Step 5: Solve for x
   x = 9,004.62/111.60
6. Step 6: Final answer
   x = 80.69