Finding the Fourth Proportional to 82.34, 123.47 and 28.23

Step by Step Solution

1. Step 1: Write the proportion equation
   82.34 : 123.47 = 28.23 : x
2. Step 2: Convert to fraction form
   82.34/123.47 = 28.23/x
3. Step 3: Cross multiply
   82.34x = 123.47 × 28.23
4. Step 4: Simplify right side
   82.34x = 3,485.56
5. Step 5: Solve for x
   x = 3,485.56/82.34
6. Step 6: Final answer
   x = 42.33