Finding the Third Proportional to 1,089,288 and 1,679,868

Step by Step Solution

1. Step 1: Write the proportion equation
   1,089,288 : 1,679,868 = 1,679,868 : x
2. Step 2: Convert to fraction form
   1,089,288/1,679,868 = 1,679,868/x
3. Step 3: Cross multiply
   1,089,288x = 1,679,868 × 1,679,868
4. Step 4: Simplify right side
   1,089,288x = 2,821,956,497,424
5. Step 5: Solve for x
   x = 2,821,956,497,424/1,089,288
6. Step 6: Final answer
   x = 2,590,643.15