Finding the Third Proportional to 688,606 and 1,485,980

Step by Step Solution

1. Step 1: Write the proportion equation
   688,606 : 1,485,980 = 1,485,980 : x
2. Step 2: Convert to fraction form
   688,606/1,485,980 = 1,485,980/x
3. Step 3: Cross multiply
   688,606x = 1,485,980 × 1,485,980
4. Step 4: Simplify right side
   688,606x = 2,208,136,560,400
5. Step 5: Solve for x
   x = 2,208,136,560,400/688,606
6. Step 6: Final answer
   x = 3,206,676.33