Finding the Fourth Proportional to 9,000.91, 12,413.20 and 5,644.09

Step by Step Solution

1. Step 1: Write the proportion equation
   9,000.91 : 12,413.20 = 5,644.09 : x
2. Step 2: Convert to fraction form
   9,000.91/12,413.20 = 5,644.09/x
3. Step 3: Cross multiply
   9,000.91x = 12,413.20 × 5,644.09
4. Step 4: Simplify right side
   9,000.91x = 70,061,217.99
5. Step 5: Solve for x
   x = 70,061,217.99/9,000.91
6. Step 6: Final answer
   x = 7,783.79