Finding the Third Proportional to 2,490 and 5,709

Step by Step Solution

1. Step 1: Write the proportion equation
   2,490 : 5,709 = 5,709 : x
2. Step 2: Convert to fraction form
   2,490/5,709 = 5,709/x
3. Step 3: Cross multiply
   2,490x = 5,709 × 5,709
4. Step 4: Simplify right side
   2,490x = 32,592,681
5. Step 5: Solve for x
   x = 32,592,681/2,490
6. Step 6: Final answer
   x = 13,089.43