Finding the Fourth Proportional to 13,413.38, 18,507.71 and 7,443.77

Step by Step Solution

1. Step 1: Write the proportion equation
   13,413.38 : 18,507.71 = 7,443.77 : x
2. Step 2: Convert to fraction form
   13,413.38/18,507.71 = 7,443.77/x
3. Step 3: Cross multiply
   13,413.38x = 18,507.71 × 7,443.77
4. Step 4: Simplify right side
   13,413.38x = 137,767,062.54
5. Step 5: Solve for x
   x = 137,767,062.54/13,413.38
6. Step 6: Final answer
   x = 10,270.87