Finding the Third Proportional to 645,426 and 1,399,716

Step by Step Solution

1. Step 1: Write the proportion equation
   645,426 : 1,399,716 = 1,399,716 : x
2. Step 2: Convert to fraction form
   645,426/1,399,716 = 1,399,716/x
3. Step 3: Cross multiply
   645,426x = 1,399,716 × 1,399,716
4. Step 4: Simplify right side
   645,426x = 1,959,204,880,656
5. Step 5: Solve for x
   x = 1,959,204,880,656/645,426
6. Step 6: Final answer
   x = 3,035,522.09