Finding the Third Proportional to 1,638,344 and 3,591,624

Step by Step Solution

1. Step 1: Write the proportion equation
   1,638,344 : 3,591,624 = 3,591,624 : x
2. Step 2: Convert to fraction form
   1,638,344/3,591,624 = 3,591,624/x
3. Step 3: Cross multiply
   1,638,344x = 3,591,624 × 3,591,624
4. Step 4: Simplify right side
   1,638,344x = 12,899,762,957,376
5. Step 5: Solve for x
   x = 12,899,762,957,376/1,638,344
6. Step 6: Final answer
   x = 7,873,659.60