Finding the Fourth Proportional to 82.55, 123.83 and 28.46

Step by Step Solution

1. Step 1: Write the proportion equation
   82.55 : 123.83 = 28.46 : x
2. Step 2: Convert to fraction form
   82.55/123.83 = 28.46/x
3. Step 3: Cross multiply
   82.55x = 123.83 × 28.46
4. Step 4: Simplify right side
   82.55x = 3,523.44
5. Step 5: Solve for x
   x = 3,523.44/82.55
6. Step 6: Final answer
   x = 42.69