Finding the Third Proportional to 685,446 and 1,054,281

Step by Step Solution

1. Step 1: Write the proportion equation
   685,446 : 1,054,281 = 1,054,281 : x
2. Step 2: Convert to fraction form
   685,446/1,054,281 = 1,054,281/x
3. Step 3: Cross multiply
   685,446x = 1,054,281 × 1,054,281
4. Step 4: Simplify right side
   685,446x = 1,111,508,426,961
5. Step 5: Solve for x
   x = 1,111,508,426,961/685,446
6. Step 6: Final answer
   x = 1,621,584.23