Finding the Fourth Proportional to 111.34, 167.28 and 104.86

Step by Step Solution

1. Step 1: Write the proportion equation
   111.34 : 167.28 = 104.86 : x
2. Step 2: Convert to fraction form
   111.34/167.28 = 104.86/x
3. Step 3: Cross multiply
   111.34x = 167.28 × 104.86
4. Step 4: Simplify right side
   111.34x = 17,540.98
5. Step 5: Solve for x
   x = 17,540.98/111.34
6. Step 6: Final answer
   x = 157.54