Finding the Fourth Proportional to 12,190.47, 16,823.61 and 7,413.78

Step by Step Solution

1. Step 1: Write the proportion equation
   12,190.47 : 16,823.61 = 7,413.78 : x
2. Step 2: Convert to fraction form
   12,190.47/16,823.61 = 7,413.78/x
3. Step 3: Cross multiply
   12,190.47x = 16,823.61 × 7,413.78
4. Step 4: Simplify right side
   12,190.47x = 124,726,543.35
5. Step 5: Solve for x
   x = 124,726,543.35/12,190.47
6. Step 6: Final answer
   x = 10,231.48