Finding the Fourth Proportional to 82.07, 123.24 and 72.62

Step by Step Solution

1. Step 1: Write the proportion equation
   82.07 : 123.24 = 72.62 : x
2. Step 2: Convert to fraction form
   82.07/123.24 = 72.62/x
3. Step 3: Cross multiply
   82.07x = 123.24 × 72.62
4. Step 4: Simplify right side
   82.07x = 8,949.69
5. Step 5: Solve for x
   x = 8,949.69/82.07
6. Step 6: Final answer
   x = 109.05