Finding the Third Proportional to 10,858 and 17,439

Step by Step Solution

1. Step 1: Write the proportion equation
   10,858 : 17,439 = 17,439 : x
2. Step 2: Convert to fraction form
   10,858/17,439 = 17,439/x
3. Step 3: Cross multiply
   10,858x = 17,439 × 17,439
4. Step 4: Simplify right side
   10,858x = 304,118,721
5. Step 5: Solve for x
   x = 304,118,721/10,858
6. Step 6: Final answer
   x = 28,008.72