Finding the Third Proportional to 1,638,329 and 3,591,587

Step by Step Solution

1. Step 1: Write the proportion equation
   1,638,329 : 3,591,587 = 3,591,587 : x
2. Step 2: Convert to fraction form
   1,638,329/3,591,587 = 3,591,587/x
3. Step 3: Cross multiply
   1,638,329x = 3,591,587 × 3,591,587
4. Step 4: Simplify right side
   1,638,329x = 12,899,497,178,569
5. Step 5: Solve for x
   x = 12,899,497,178,569/1,638,329
6. Step 6: Final answer
   x = 7,873,569.46