Finding the Fourth Proportional to 82.58, 123.93 and 28.48

Step by Step Solution

1. Step 1: Write the proportion equation
   82.58 : 123.93 = 28.48 : x
2. Step 2: Convert to fraction form
   82.58/123.93 = 28.48/x
3. Step 3: Cross multiply
   82.58x = 123.93 × 28.48
4. Step 4: Simplify right side
   82.58x = 3,529.10
5. Step 5: Solve for x
   x = 3,529.10/82.58
6. Step 6: Final answer
   x = 42.73