Finding the Fourth Proportional to 82.72, 123.53 and 68.24

Step by Step Solution

1. Step 1: Write the proportion equation
   82.72 : 123.53 = 68.24 : x
2. Step 2: Convert to fraction form
   82.72/123.53 = 68.24/x
3. Step 3: Cross multiply
   82.72x = 123.53 × 68.24
4. Step 4: Simplify right side
   82.72x = 8,429.69
5. Step 5: Solve for x
   x = 8,429.69/82.72
6. Step 6: Final answer
   x = 101.91