Finding the Fourth Proportional to 82.62, 123.85 and 28.48

Step by Step Solution

1. Step 1: Write the proportion equation
   82.62 : 123.85 = 28.48 : x
2. Step 2: Convert to fraction form
   82.62/123.85 = 28.48/x
3. Step 3: Cross multiply
   82.62x = 123.85 × 28.48
4. Step 4: Simplify right side
   82.62x = 3,526.94
5. Step 5: Solve for x
   x = 3,526.94/82.62
6. Step 6: Final answer
   x = 42.69