Finding the Fourth Proportional to 111.51, 167.31 and 93.42

Step by Step Solution

1. Step 1: Write the proportion equation
   111.51 : 167.31 = 93.42 : x
2. Step 2: Convert to fraction form
   111.51/167.31 = 93.42/x
3. Step 3: Cross multiply
   111.51x = 167.31 × 93.42
4. Step 4: Simplify right side
   111.51x = 15,630.10
5. Step 5: Solve for x
   x = 15,630.10/111.51
6. Step 6: Final answer
   x = 140.17