Finding the Third Proportional to 1,089,290 and 1,679,871

Step by Step Solution

1. Step 1: Write the proportion equation
   1,089,290 : 1,679,871 = 1,679,871 : x
2. Step 2: Convert to fraction form
   1,089,290/1,679,871 = 1,679,871/x
3. Step 3: Cross multiply
   1,089,290x = 1,679,871 × 1,679,871
4. Step 4: Simplify right side
   1,089,290x = 2,821,966,576,641
5. Step 5: Solve for x
   x = 2,821,966,576,641/1,089,290
6. Step 6: Final answer
   x = 2,590,647.65