Finding the Fourth Proportional to 82.74, 123.33 and 82.62

Step by Step Solution

1. Step 1: Write the proportion equation
   82.74 : 123.33 = 82.62 : x
2. Step 2: Convert to fraction form
   82.74/123.33 = 82.62/x
3. Step 3: Cross multiply
   82.74x = 123.33 × 82.62
4. Step 4: Simplify right side
   82.74x = 10,189.52
5. Step 5: Solve for x
   x = 10,189.52/82.74
6. Step 6: Final answer
   x = 123.15