Finding the Fourth Proportional to 111.68, 167.37 and 73.15

Step by Step Solution

1. Step 1: Write the proportion equation
   111.68 : 167.37 = 73.15 : x
2. Step 2: Convert to fraction form
   111.68/167.37 = 73.15/x
3. Step 3: Cross multiply
   111.68x = 167.37 × 73.15
4. Step 4: Simplify right side
   111.68x = 12,242.28
5. Step 5: Solve for x
   x = 12,242.28/111.68
6. Step 6: Final answer
   x = 109.62