Finding the Third Proportional to 639,036 and 1,002,438

Step by Step Solution

1. Step 1: Write the proportion equation
   639,036 : 1,002,438 = 1,002,438 : x
2. Step 2: Convert to fraction form
   639,036/1,002,438 = 1,002,438/x
3. Step 3: Cross multiply
   639,036x = 1,002,438 × 1,002,438
4. Step 4: Simplify right side
   639,036x = 1,004,881,943,844
5. Step 5: Solve for x
   x = 1,004,881,943,844/639,036
6. Step 6: Final answer
   x = 1,572,496.61