Finding the Third Proportional to 401,637 and 836,570

Step by Step Solution

1. Step 1: Write the proportion equation
   401,637 : 836,570 = 836,570 : x
2. Step 2: Convert to fraction form
   401,637/836,570 = 836,570/x
3. Step 3: Cross multiply
   401,637x = 836,570 × 836,570
4. Step 4: Simplify right side
   401,637x = 699,849,364,900
5. Step 5: Solve for x
   x = 699,849,364,900/401,637
6. Step 6: Final answer
   x = 1,742,492.26