Finding the Third Proportional to 8,401 and 12,520

Step by Step Solution

1. Step 1: Write the proportion equation
   8,401 : 12,520 = 12,520 : x
2. Step 2: Convert to fraction form
   8,401/12,520 = 12,520/x
3. Step 3: Cross multiply
   8,401x = 12,520 × 12,520
4. Step 4: Simplify right side
   8,401x = 156,750,400
5. Step 5: Solve for x
   x = 156,750,400/8,401
6. Step 6: Final answer
   x = 18,658.54