Finding the Third Proportional to 1,638,346 and 3,591,628

Step by Step Solution

1. Step 1: Write the proportion equation
   1,638,346 : 3,591,628 = 3,591,628 : x
2. Step 2: Convert to fraction form
   1,638,346/3,591,628 = 3,591,628/x
3. Step 3: Cross multiply
   1,638,346x = 3,591,628 × 3,591,628
4. Step 4: Simplify right side
   1,638,346x = 12,899,791,690,384
5. Step 5: Solve for x
   x = 12,899,791,690,384/1,638,346
6. Step 6: Final answer
   x = 7,873,667.52