Finding the Fourth Proportional to 11,258.04, 16,890.71 and 5,413.89

Step by Step Solution

1. Step 1: Write the proportion equation
   11,258.04 : 16,890.71 = 5,413.89 : x
2. Step 2: Convert to fraction form
   11,258.04/16,890.71 = 5,413.89/x
3. Step 3: Cross multiply
   11,258.04x = 16,890.71 × 5,413.89
4. Step 4: Simplify right side
   11,258.04x = 91,444,418.89
5. Step 5: Solve for x
   x = 91,444,418.89/11,258.04
6. Step 6: Final answer
   x = 8,122.59