Finding the Fourth Proportional to 111.98, 167.67 and 104.19

Step by Step Solution

1. Step 1: Write the proportion equation
   111.98 : 167.67 = 104.19 : x
2. Step 2: Convert to fraction form
   111.98/167.67 = 104.19/x
3. Step 3: Cross multiply
   111.98x = 167.67 × 104.19
4. Step 4: Simplify right side
   111.98x = 17,468.91
5. Step 5: Solve for x
   x = 17,468.91/111.98
6. Step 6: Final answer
   x = 156.00