Finding the Third Proportional to 1,638,579 and 3,355,872

Step by Step Solution

1. Step 1: Write the proportion equation
   1,638,579 : 3,355,872 = 3,355,872 : x
2. Step 2: Convert to fraction form
   1,638,579/3,355,872 = 3,355,872/x
3. Step 3: Cross multiply
   1,638,579x = 3,355,872 × 3,355,872
4. Step 4: Simplify right side
   1,638,579x = 11,261,876,880,384
5. Step 5: Solve for x
   x = 11,261,876,880,384/1,638,579
6. Step 6: Final answer
   x = 6,872,953.26