Finding the Third Proportional to 643,906 and 1,019,372

Step by Step Solution

1. Step 1: Write the proportion equation
   643,906 : 1,019,372 = 1,019,372 : x
2. Step 2: Convert to fraction form
   643,906/1,019,372 = 1,019,372/x
3. Step 3: Cross multiply
   643,906x = 1,019,372 × 1,019,372
4. Step 4: Simplify right side
   643,906x = 1,039,119,274,384
5. Step 5: Solve for x
   x = 1,039,119,274,384/643,906
6. Step 6: Final answer
   x = 1,613,774.80