Finding the Third Proportional to 641,389 and 1,392,074

Step by Step Solution

1. Step 1: Write the proportion equation
   641,389 : 1,392,074 = 1,392,074 : x
2. Step 2: Convert to fraction form
   641,389/1,392,074 = 1,392,074/x
3. Step 3: Cross multiply
   641,389x = 1,392,074 × 1,392,074
4. Step 4: Simplify right side
   641,389x = 1,937,870,021,476
5. Step 5: Solve for x
   x = 1,937,870,021,476/641,389
6. Step 6: Final answer
   x = 3,021,364.60