Finding the Fourth Proportional to 111.42, 167.33 and 84.56

Step by Step Solution

1. Step 1: Write the proportion equation
   111.42 : 167.33 = 84.56 : x
2. Step 2: Convert to fraction form
   111.42/167.33 = 84.56/x
3. Step 3: Cross multiply
   111.42x = 167.33 × 84.56
4. Step 4: Simplify right side
   111.42x = 14,148.80
5. Step 5: Solve for x
   x = 14,148.80/111.42
6. Step 6: Final answer
   x = 126.99