Finding the Third Proportional to 647,507 and 1,320,709

Step by Step Solution

1. Step 1: Write the proportion equation
   647,507 : 1,320,709 = 1,320,709 : x
2. Step 2: Convert to fraction form
   647,507/1,320,709 = 1,320,709/x
3. Step 3: Cross multiply
   647,507x = 1,320,709 × 1,320,709
4. Step 4: Simplify right side
   647,507x = 1,744,272,262,681
5. Step 5: Solve for x
   x = 1,744,272,262,681/647,507
6. Step 6: Final answer
   x = 2,693,827.65