Finding the Third Proportional to 13,447 and 20,890

Step by Step Solution

1. Step 1: Write the proportion equation
   13,447 : 20,890 = 20,890 : x
2. Step 2: Convert to fraction form
   13,447/20,890 = 20,890/x
3. Step 3: Cross multiply
   13,447x = 20,890 × 20,890
4. Step 4: Simplify right side
   13,447x = 436,392,100
5. Step 5: Solve for x
   x = 436,392,100/13,447
6. Step 6: Final answer
   x = 32,452.75