Finding the Third Proportional to 1,200,456 and 2,561,616

Step by Step Solution

1. Step 1: Write the proportion equation
   1,200,456 : 2,561,616 = 2,561,616 : x
2. Step 2: Convert to fraction form
   1,200,456/2,561,616 = 2,561,616/x
3. Step 3: Cross multiply
   1,200,456x = 2,561,616 × 2,561,616
4. Step 4: Simplify right side
   1,200,456x = 6,561,876,531,456
5. Step 5: Solve for x
   x = 6,561,876,531,456/1,200,456
6. Step 6: Final answer
   x = 5,466,153.30