Finding the Third Proportional to 681,688 and 1,036,697

Step by Step Solution

1. Step 1: Write the proportion equation
   681,688 : 1,036,697 = 1,036,697 : x
2. Step 2: Convert to fraction form
   681,688/1,036,697 = 1,036,697/x
3. Step 3: Cross multiply
   681,688x = 1,036,697 × 1,036,697
4. Step 4: Simplify right side
   681,688x = 1,074,740,669,809
5. Step 5: Solve for x
   x = 1,074,740,669,809/681,688
6. Step 6: Final answer
   x = 1,576,587.34