Finding the Fourth Proportional to 82.15, 123.25 and 60.15

Step by Step Solution

1. Step 1: Write the proportion equation
   82.15 : 123.25 = 60.15 : x
2. Step 2: Convert to fraction form
   82.15/123.25 = 60.15/x
3. Step 3: Cross multiply
   82.15x = 123.25 × 60.15
4. Step 4: Simplify right side
   82.15x = 7,413.49
5. Step 5: Solve for x
   x = 7,413.49/82.15
6. Step 6: Final answer
   x = 90.24