Finding the Fourth Proportional to 83.18, 123.90 and 82.73

Step by Step Solution

1. Step 1: Write the proportion equation
   83.18 : 123.90 = 82.73 : x
2. Step 2: Convert to fraction form
   83.18/123.90 = 82.73/x
3. Step 3: Cross multiply
   83.18x = 123.90 × 82.73
4. Step 4: Simplify right side
   83.18x = 10,250.25
5. Step 5: Solve for x
   x = 10,250.25/83.18
6. Step 6: Final answer
   x = 123.23