Finding the Third Proportional to 1,205,638 and 1,685,660

Step by Step Solution

1. Step 1: Write the proportion equation
   1,205,638 : 1,685,660 = 1,685,660 : x
2. Step 2: Convert to fraction form
   1,205,638/1,685,660 = 1,685,660/x
3. Step 3: Cross multiply
   1,205,638x = 1,685,660 × 1,685,660
4. Step 4: Simplify right side
   1,205,638x = 2,841,449,635,600
5. Step 5: Solve for x
   x = 2,841,449,635,600/1,205,638
6. Step 6: Final answer
   x = 2,356,801.66