Finding the Fourth Proportional to 82.68, 123.94 and 28.54

Step by Step Solution

1. Step 1: Write the proportion equation
   82.68 : 123.94 = 28.54 : x
2. Step 2: Convert to fraction form
   82.68/123.94 = 28.54/x
3. Step 3: Cross multiply
   82.68x = 123.94 × 28.54
4. Step 4: Simplify right side
   82.68x = 3,537.25
5. Step 5: Solve for x
   x = 3,537.25/82.68
6. Step 6: Final answer
   x = 42.78