Finding the Fourth Proportional to 82.39, 123.50 and 48.16

Step by Step Solution

1. Step 1: Write the proportion equation
   82.39 : 123.50 = 48.16 : x
2. Step 2: Convert to fraction form
   82.39/123.50 = 48.16/x
3. Step 3: Cross multiply
   82.39x = 123.50 × 48.16
4. Step 4: Simplify right side
   82.39x = 5,946.90
5. Step 5: Solve for x
   x = 5,946.90/82.39
6. Step 6: Final answer
   x = 72.18