Finding the Fourth Proportional to 111.81, 167.73 and 53.25

Step by Step Solution

1. Step 1: Write the proportion equation
   111.81 : 167.73 = 53.25 : x
2. Step 2: Convert to fraction form
   111.81/167.73 = 53.25/x
3. Step 3: Cross multiply
   111.81x = 167.73 × 53.25
4. Step 4: Simplify right side
   111.81x = 8,931.62
5. Step 5: Solve for x
   x = 8,931.62/111.81
6. Step 6: Final answer
   x = 79.88