Finding the Fourth Proportional to 72.68, 108.89 and 65.17

Step by Step Solution

1. Step 1: Write the proportion equation
   72.68 : 108.89 = 65.17 : x
2. Step 2: Convert to fraction form
   72.68/108.89 = 65.17/x
3. Step 3: Cross multiply
   72.68x = 108.89 × 65.17
4. Step 4: Simplify right side
   72.68x = 7,095.49
5. Step 5: Solve for x
   x = 7,095.49/72.68
6. Step 6: Final answer
   x = 97.63