Finding the Fourth Proportional to 111.97, 168.00 and 60.55

Step by Step Solution

1. Step 1: Write the proportion equation
   111.97 : 168.00 = 60.55 : x
2. Step 2: Convert to fraction form
   111.97/168.00 = 60.55/x
3. Step 3: Cross multiply
   111.97x = 168.00 × 60.55
4. Step 4: Simplify right side
   111.97x = 10,172.72
5. Step 5: Solve for x
   x = 10,172.72/111.97
6. Step 6: Final answer
   x = 90.85