Finding the Fourth Proportional to 82.72, 114.24 and 65.68

Step by Step Solution

1. Step 1: Write the proportion equation
   82.72 : 114.24 = 65.68 : x
2. Step 2: Convert to fraction form
   82.72/114.24 = 65.68/x
3. Step 3: Cross multiply
   82.72x = 114.24 × 65.68
4. Step 4: Simplify right side
   82.72x = 7,503.28
5. Step 5: Solve for x
   x = 7,503.28/82.72
6. Step 6: Final answer
   x = 90.71