Finding the Third Proportional to 1,220,638 and 1,775,550

Step by Step Solution

1. Step 1: Write the proportion equation
   1,220,638 : 1,775,550 = 1,775,550 : x
2. Step 2: Convert to fraction form
   1,220,638/1,775,550 = 1,775,550/x
3. Step 3: Cross multiply
   1,220,638x = 1,775,550 × 1,775,550
4. Step 4: Simplify right side
   1,220,638x = 3,152,577,802,500
5. Step 5: Solve for x
   x = 3,152,577,802,500/1,220,638
6. Step 6: Final answer
   x = 2,582,729.53