Finding the Fourth Proportional to 111.33, 167.61 and 84.51

Step by Step Solution

1. Step 1: Write the proportion equation
   111.33 : 167.61 = 84.51 : x
2. Step 2: Convert to fraction form
   111.33/167.61 = 84.51/x
3. Step 3: Cross multiply
   111.33x = 167.61 × 84.51
4. Step 4: Simplify right side
   111.33x = 14,164.72
5. Step 5: Solve for x
   x = 14,164.72/111.33
6. Step 6: Final answer
   x = 127.23