Finding the Fourth Proportional to 19,870.47, 27,413.37 and 12,801

Step by Step Solution

1. Step 1: Write the proportion equation
   19,870.47 : 27,413.37 = 12,801 : x
2. Step 2: Convert to fraction form
   19,870.47/27,413.37 = 12,801/x
3. Step 3: Cross multiply
   19,870.47x = 27,413.37 × 12,801
4. Step 4: Simplify right side
   19,870.47x = 350,918,549.37
5. Step 5: Solve for x
   x = 350,918,549.37/19,870.47
6. Step 6: Final answer
   x = 17,660.30