Finding the Fourth Proportional to 108.34, 162.52 and 72.18

Step by Step Solution

1. Step 1: Write the proportion equation
   108.34 : 162.52 = 72.18 : x
2. Step 2: Convert to fraction form
   108.34/162.52 = 72.18/x
3. Step 3: Cross multiply
   108.34x = 162.52 × 72.18
4. Step 4: Simplify right side
   108.34x = 11,730.69
5. Step 5: Solve for x
   x = 11,730.69/108.34
6. Step 6: Final answer
   x = 108.28