Finding the Third Proportional to 516,679.50 and 814,638

Step by Step Solution

1. Step 1: Write the proportion equation
   516,679.50 : 814,638 = 814,638 : x
2. Step 2: Convert to fraction form
   516,679.50/814,638 = 814,638/x
3. Step 3: Cross multiply
   516,679.50x = 814,638 × 814,638
4. Step 4: Simplify right side
   516,679.50x = 663,635,071,044
5. Step 5: Solve for x
   x = 663,635,071,044/516,679.50
6. Step 6: Final answer
   x = 1,284,423.07