Finding the Fourth Proportional to 111.57, 167.31 and 104.38

Step by Step Solution

1. Step 1: Write the proportion equation
   111.57 : 167.31 = 104.38 : x
2. Step 2: Convert to fraction form
   111.57/167.31 = 104.38/x
3. Step 3: Cross multiply
   111.57x = 167.31 × 104.38
4. Step 4: Simplify right side
   111.57x = 17,463.82
5. Step 5: Solve for x
   x = 17,463.82/111.57
6. Step 6: Final answer
   x = 156.53