Finding the Fourth Proportional to 111.89, 167.53 and 79.28

Step by Step Solution

1. Step 1: Write the proportion equation
   111.89 : 167.53 = 79.28 : x
2. Step 2: Convert to fraction form
   111.89/167.53 = 79.28/x
3. Step 3: Cross multiply
   111.89x = 167.53 × 79.28
4. Step 4: Simplify right side
   111.89x = 13,280.54
5. Step 5: Solve for x
   x = 13,280.54/111.89
6. Step 6: Final answer
   x = 118.69