Finding the Fourth Proportional to 82.28, 123.18 and 79.24

Step by Step Solution

1. Step 1: Write the proportion equation
   82.28 : 123.18 = 79.24 : x
2. Step 2: Convert to fraction form
   82.28/123.18 = 79.24/x
3. Step 3: Cross multiply
   82.28x = 123.18 × 79.24
4. Step 4: Simplify right side
   82.28x = 9,760.78
5. Step 5: Solve for x
   x = 9,760.78/82.28
6. Step 6: Final answer
   x = 118.63