Finding the Fourth Proportional to 111.61, 167.21 and 65.23

Step by Step Solution

1. Step 1: Write the proportion equation
   111.61 : 167.21 = 65.23 : x
2. Step 2: Convert to fraction form
   111.61/167.21 = 65.23/x
3. Step 3: Cross multiply
   111.61x = 167.21 × 65.23
4. Step 4: Simplify right side
   111.61x = 10,906.61
5. Step 5: Solve for x
   x = 10,906.61/111.61
6. Step 6: Final answer
   x = 97.72