Finding the Third Proportional to 5,870 and 10,439

Step by Step Solution

1. Step 1: Write the proportion equation
   5,870 : 10,439 = 10,439 : x
2. Step 2: Convert to fraction form
   5,870/10,439 = 10,439/x
3. Step 3: Cross multiply
   5,870x = 10,439 × 10,439
4. Step 4: Simplify right side
   5,870x = 108,972,721
5. Step 5: Solve for x
   x = 108,972,721/5,870
6. Step 6: Final answer
   x = 18,564.35