Finding the Third Proportional to 14,188 and 20,890

Step by Step Solution

1. Step 1: Write the proportion equation
   14,188 : 20,890 = 20,890 : x
2. Step 2: Convert to fraction form
   14,188/20,890 = 20,890/x
3. Step 3: Cross multiply
   14,188x = 20,890 × 20,890
4. Step 4: Simplify right side
   14,188x = 436,392,100
5. Step 5: Solve for x
   x = 436,392,100/14,188
6. Step 6: Final answer
   x = 30,757.83