Finding the Fourth Proportional to 82.83, 124.15 and 28.68

Step by Step Solution

1. Step 1: Write the proportion equation
   82.83 : 124.15 = 28.68 : x
2. Step 2: Convert to fraction form
   82.83/124.15 = 28.68/x
3. Step 3: Cross multiply
   82.83x = 124.15 × 28.68
4. Step 4: Simplify right side
   82.83x = 3,560.62
5. Step 5: Solve for x
   x = 3,560.62/82.83
6. Step 6: Final answer
   x = 42.99