Finding the Third Proportional to 11,709 and 25,389

Step by Step Solution

1. Step 1: Write the proportion equation
   11,709 : 25,389 = 25,389 : x
2. Step 2: Convert to fraction form
   11,709/25,389 = 25,389/x
3. Step 3: Cross multiply
   11,709x = 25,389 × 25,389
4. Step 4: Simplify right side
   11,709x = 644,601,321
5. Step 5: Solve for x
   x = 644,601,321/11,709
6. Step 6: Final answer
   x = 55,051.78