Finding the Third Proportional to 1,039,808 and 2,161,312

Step by Step Solution

1. Step 1: Write the proportion equation
   1,039,808 : 2,161,312 = 2,161,312 : x
2. Step 2: Convert to fraction form
   1,039,808/2,161,312 = 2,161,312/x
3. Step 3: Cross multiply
   1,039,808x = 2,161,312 × 2,161,312
4. Step 4: Simplify right side
   1,039,808x = 4,671,269,561,344
5. Step 5: Solve for x
   x = 4,671,269,561,344/1,039,808
6. Step 6: Final answer
   x = 4,492,434.72