Finding the Fourth Proportional to 111.83, 167.74 and 54.02

Step by Step Solution

1. Step 1: Write the proportion equation
   111.83 : 167.74 = 54.02 : x
2. Step 2: Convert to fraction form
   111.83/167.74 = 54.02/x
3. Step 3: Cross multiply
   111.83x = 167.74 × 54.02
4. Step 4: Simplify right side
   111.83x = 9,061.60
5. Step 5: Solve for x
   x = 9,061.60/111.83
6. Step 6: Final answer
   x = 81.03