Finding the Third Proportional to 664,690 and 1,031,172

Step by Step Solution

1. Step 1: Write the proportion equation
   664,690 : 1,031,172 = 1,031,172 : x
2. Step 2: Convert to fraction form
   664,690/1,031,172 = 1,031,172/x
3. Step 3: Cross multiply
   664,690x = 1,031,172 × 1,031,172
4. Step 4: Simplify right side
   664,690x = 1,063,315,693,584
5. Step 5: Solve for x
   x = 1,063,315,693,584/664,690
6. Step 6: Final answer
   x = 1,599,716.70