Finding the Third Proportional to 11,909 and 25,401

Step by Step Solution

1. Step 1: Write the proportion equation
   11,909 : 25,401 = 25,401 : x
2. Step 2: Convert to fraction form
   11,909/25,401 = 25,401/x
3. Step 3: Cross multiply
   11,909x = 25,401 × 25,401
4. Step 4: Simplify right side
   11,909x = 645,210,801
5. Step 5: Solve for x
   x = 645,210,801/11,909
6. Step 6: Final answer
   x = 54,178.42