Finding the Fourth Proportional to 21,413.49, 32,111.72 and 8,257.47

Step by Step Solution

1. Step 1: Write the proportion equation
   21,413.49 : 32,111.72 = 8,257.47 : x
2. Step 2: Convert to fraction form
   21,413.49/32,111.72 = 8,257.47/x
3. Step 3: Cross multiply
   21,413.49x = 32,111.72 × 8,257.47
4. Step 4: Simplify right side
   21,413.49x = 265,161,403.99
5. Step 5: Solve for x
   x = 265,161,403.99/21,413.49
6. Step 6: Final answer
   x = 12,382.92