Finding the Fourth Proportional to 82.81, 124.18 and 28.69

Step by Step Solution

1. Step 1: Write the proportion equation
   82.81 : 124.18 = 28.69 : x
2. Step 2: Convert to fraction form
   82.81/124.18 = 28.69/x
3. Step 3: Cross multiply
   82.81x = 124.18 × 28.69
4. Step 4: Simplify right side
   82.81x = 3,562.50
5. Step 5: Solve for x
   x = 3,562.50/82.81
6. Step 6: Final answer
   x = 43.02