Finding the Fourth Proportional to 111.01, 166.46 and 52.42

Step by Step Solution

1. Step 1: Write the proportion equation
   111.01 : 166.46 = 52.42 : x
2. Step 2: Convert to fraction form
   111.01/166.46 = 52.42/x
3. Step 3: Cross multiply
   111.01x = 166.46 × 52.42
4. Step 4: Simplify right side
   111.01x = 8,725.94
5. Step 5: Solve for x
   x = 8,725.94/111.01
6. Step 6: Final answer
   x = 78.61