Finding the Fourth Proportional to 9,869.38, 13,620.69 and 5,393.81

Step by Step Solution

1. Step 1: Write the proportion equation
   9,869.38 : 13,620.69 = 5,393.81 : x
2. Step 2: Convert to fraction form
   9,869.38/13,620.69 = 5,393.81/x
3. Step 3: Cross multiply
   9,869.38x = 13,620.69 × 5,393.81
4. Step 4: Simplify right side
   9,869.38x = 73,467,413.93
5. Step 5: Solve for x
   x = 73,467,413.93/9,869.38
6. Step 6: Final answer
   x = 7,443.97