Finding the Fourth Proportional to 111.91, 167.68 and 73.30

Step by Step Solution

1. Step 1: Write the proportion equation
   111.91 : 167.68 = 73.30 : x
2. Step 2: Convert to fraction form
   111.91/167.68 = 73.30/x
3. Step 3: Cross multiply
   111.91x = 167.68 × 73.30
4. Step 4: Simplify right side
   111.91x = 12,290.94
5. Step 5: Solve for x
   x = 12,290.94/111.91
6. Step 6: Final answer
   x = 109.83