Finding the Third Proportional to 641,385 and 1,392,066

Step by Step Solution

1. Step 1: Write the proportion equation
   641,385 : 1,392,066 = 1,392,066 : x
2. Step 2: Convert to fraction form
   641,385/1,392,066 = 1,392,066/x
3. Step 3: Cross multiply
   641,385x = 1,392,066 × 1,392,066
4. Step 4: Simplify right side
   641,385x = 1,937,847,748,356
5. Step 5: Solve for x
   x = 1,937,847,748,356/641,385
6. Step 6: Final answer
   x = 3,021,348.72