Finding the Third Proportional to 12,790 and 20,361

Step by Step Solution

1. Step 1: Write the proportion equation
   12,790 : 20,361 = 20,361 : x
2. Step 2: Convert to fraction form
   12,790/20,361 = 20,361/x
3. Step 3: Cross multiply
   12,790x = 20,361 × 20,361
4. Step 4: Simplify right side
   12,790x = 414,570,321
5. Step 5: Solve for x
   x = 414,570,321/12,790
6. Step 6: Final answer
   x = 32,413.63