Finding the Fourth Proportional to 12,413.22, 18,620.01 and 3,648.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,413.22 : 18,620.01 = 3,648.30 : x
2. Step 2: Convert to fraction form
   12,413.22/18,620.01 = 3,648.30/x
3. Step 3: Cross multiply
   12,413.22x = 18,620.01 × 3,648.30
4. Step 4: Simplify right side
   12,413.22x = 67,931,382.48
5. Step 5: Solve for x
   x = 67,931,382.48/12,413.22
6. Step 6: Final answer
   x = 5,472.50