Finding the Third Proportional to 1,221,558 and 2,659,980

Step by Step Solution

1. Step 1: Write the proportion equation
   1,221,558 : 2,659,980 = 2,659,980 : x
2. Step 2: Convert to fraction form
   1,221,558/2,659,980 = 2,659,980/x
3. Step 3: Cross multiply
   1,221,558x = 2,659,980 × 2,659,980
4. Step 4: Simplify right side
   1,221,558x = 7,075,493,600,400
5. Step 5: Solve for x
   x = 7,075,493,600,400/1,221,558
6. Step 6: Final answer
   x = 5,792,188.01