Finding the Fourth Proportional to 13,413.18, 18,509.91 and 7,444.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,413.18 : 18,509.91 = 7,444.50 : x
2. Step 2: Convert to fraction form
   13,413.18/18,509.91 = 7,444.50/x
3. Step 3: Cross multiply
   13,413.18x = 18,509.91 × 7,444.50
4. Step 4: Simplify right side
   13,413.18x = 137,797,025.00
5. Step 5: Solve for x
   x = 137,797,025.00/13,413.18
6. Step 6: Final answer
   x = 10,273.26