Finding the Third Proportional to 9,861.50 and 21,451

Step by Step Solution

1. Step 1: Write the proportion equation
   9,861.50 : 21,451 = 21,451 : x
2. Step 2: Convert to fraction form
   9,861.50/21,451 = 21,451/x
3. Step 3: Cross multiply
   9,861.50x = 21,451 × 21,451
4. Step 4: Simplify right side
   9,861.50x = 460,145,401
5. Step 5: Solve for x
   x = 460,145,401/9,861.50
6. Step 6: Final answer
   x = 46,660.79