Finding the Fourth Proportional to 111.54, 167.18 and 84.42

Step by Step Solution

1. Step 1: Write the proportion equation
   111.54 : 167.18 = 84.42 : x
2. Step 2: Convert to fraction form
   111.54/167.18 = 84.42/x
3. Step 3: Cross multiply
   111.54x = 167.18 × 84.42
4. Step 4: Simplify right side
   111.54x = 14,113.34
5. Step 5: Solve for x
   x = 14,113.34/111.54
6. Step 6: Final answer
   x = 126.53