Finding the Third Proportional to 990,840 and 2,109,552

Step by Step Solution

1. Step 1: Write the proportion equation
   990,840 : 2,109,552 = 2,109,552 : x
2. Step 2: Convert to fraction form
   990,840/2,109,552 = 2,109,552/x
3. Step 3: Cross multiply
   990,840x = 2,109,552 × 2,109,552
4. Step 4: Simplify right side
   990,840x = 4,450,209,640,704
5. Step 5: Solve for x
   x = 4,450,209,640,704/990,840
6. Step 6: Final answer
   x = 4,491,350.41