Finding the Third Proportional to 686,522 and 1,487,412

Step by Step Solution

1. Step 1: Write the proportion equation
   686,522 : 1,487,412 = 1,487,412 : x
2. Step 2: Convert to fraction form
   686,522/1,487,412 = 1,487,412/x
3. Step 3: Cross multiply
   686,522x = 1,487,412 × 1,487,412
4. Step 4: Simplify right side
   686,522x = 2,212,394,457,744
5. Step 5: Solve for x
   x = 2,212,394,457,744/686,522
6. Step 6: Final answer
   x = 3,222,612.62