Finding the Third Proportional to 687,122 and 1,069,945

Step by Step Solution

1. Step 1: Write the proportion equation
   687,122 : 1,069,945 = 1,069,945 : x
2. Step 2: Convert to fraction form
   687,122/1,069,945 = 1,069,945/x
3. Step 3: Cross multiply
   687,122x = 1,069,945 × 1,069,945
4. Step 4: Simplify right side
   687,122x = 1,144,782,303,025
5. Step 5: Solve for x
   x = 1,144,782,303,025/687,122
6. Step 6: Final answer
   x = 1,666,053.92