Finding the Fourth Proportional to 82.38, 123.48 and 48.18

Step by Step Solution

1. Step 1: Write the proportion equation
   82.38 : 123.48 = 48.18 : x
2. Step 2: Convert to fraction form
   82.38/123.48 = 48.18/x
3. Step 3: Cross multiply
   82.38x = 123.48 × 48.18
4. Step 4: Simplify right side
   82.38x = 5,949.03
5. Step 5: Solve for x
   x = 5,949.03/82.38
6. Step 6: Final answer
   x = 72.21