Finding the Fourth Proportional to 9,890.22, 13,648.50 and 5,413.97

Step by Step Solution

1. Step 1: Write the proportion equation
   9,890.22 : 13,648.50 = 5,413.97 : x
2. Step 2: Convert to fraction form
   9,890.22/13,648.50 = 5,413.97/x
3. Step 3: Cross multiply
   9,890.22x = 13,648.50 × 5,413.97
4. Step 4: Simplify right side
   9,890.22x = 73,892,603.67
5. Step 5: Solve for x
   x = 73,892,603.67/9,890.22
6. Step 6: Final answer
   x = 7,471.28