Finding the Fourth Proportional to 111.94, 167.83 and 54.16

Step by Step Solution

1. Step 1: Write the proportion equation
   111.94 : 167.83 = 54.16 : x
2. Step 2: Convert to fraction form
   111.94/167.83 = 54.16/x
3. Step 3: Cross multiply
   111.94x = 167.83 × 54.16
4. Step 4: Simplify right side
   111.94x = 9,089.12
5. Step 5: Solve for x
   x = 9,089.12/111.94
6. Step 6: Final answer
   x = 81.20