Finding the Third Proportional to 12,890 and 28,271

Step by Step Solution

1. Step 1: Write the proportion equation
   12,890 : 28,271 = 28,271 : x
2. Step 2: Convert to fraction form
   12,890/28,271 = 28,271/x
3. Step 3: Cross multiply
   12,890x = 28,271 × 28,271
4. Step 4: Simplify right side
   12,890x = 799,249,441
5. Step 5: Solve for x
   x = 799,249,441/12,890
6. Step 6: Final answer
   x = 62,005.39