Finding the Fourth Proportional to 111.02, 166.46 and 42.53

Step by Step Solution

1. Step 1: Write the proportion equation
   111.02 : 166.46 = 42.53 : x
2. Step 2: Convert to fraction form
   111.02/166.46 = 42.53/x
3. Step 3: Cross multiply
   111.02x = 166.46 × 42.53
4. Step 4: Simplify right side
   111.02x = 7,078.50
5. Step 5: Solve for x
   x = 7,078.50/111.02
6. Step 6: Final answer
   x = 63.76