Finding the Third Proportional to 1,638,336 and 3,591,600

Step by Step Solution

1. Step 1: Write the proportion equation
   1,638,336 : 3,591,600 = 3,591,600 : x
2. Step 2: Convert to fraction form
   1,638,336/3,591,600 = 3,591,600/x
3. Step 3: Cross multiply
   1,638,336x = 3,591,600 × 3,591,600
4. Step 4: Simplify right side
   1,638,336x = 12,899,590,560,000
5. Step 5: Solve for x
   x = 12,899,590,560,000/1,638,336
6. Step 6: Final answer
   x = 7,873,592.82