Finding the Third Proportional to 2,586 and 5,781

Step by Step Solution

1. Step 1: Write the proportion equation
   2,586 : 5,781 = 5,781 : x
2. Step 2: Convert to fraction form
   2,586/5,781 = 5,781/x
3. Step 3: Cross multiply
   2,586x = 5,781 × 5,781
4. Step 4: Simplify right side
   2,586x = 33,419,961
5. Step 5: Solve for x
   x = 33,419,961/2,586
6. Step 6: Final answer
   x = 12,923.42