Finding the Third Proportional to 638,668 and 1,064,402

Step by Step Solution

1. Step 1: Write the proportion equation
   638,668 : 1,064,402 = 1,064,402 : x
2. Step 2: Convert to fraction form
   638,668/1,064,402 = 1,064,402/x
3. Step 3: Cross multiply
   638,668x = 1,064,402 × 1,064,402
4. Step 4: Simplify right side
   638,668x = 1,132,951,617,604
5. Step 5: Solve for x
   x = 1,132,951,617,604/638,668
6. Step 6: Final answer
   x = 1,773,928.89