Finding the Fourth Proportional to 82.82, 124.15 and 28.69

Step by Step Solution

1. Step 1: Write the proportion equation
   82.82 : 124.15 = 28.69 : x
2. Step 2: Convert to fraction form
   82.82/124.15 = 28.69/x
3. Step 3: Cross multiply
   82.82x = 124.15 × 28.69
4. Step 4: Simplify right side
   82.82x = 3,561.10
5. Step 5: Solve for x
   x = 3,561.10/82.82
6. Step 6: Final answer
   x = 43.00