Finding the Third Proportional to 1,640,644 and 2,567,825

Step by Step Solution

1. Step 1: Write the proportion equation
   1,640,644 : 2,567,825 = 2,567,825 : x
2. Step 2: Convert to fraction form
   1,640,644/2,567,825 = 2,567,825/x
3. Step 3: Cross multiply
   1,640,644x = 2,567,825 × 2,567,825
4. Step 4: Simplify right side
   1,640,644x = 6,593,725,230,625
5. Step 5: Solve for x
   x = 6,593,725,230,625/1,640,644
6. Step 6: Final answer
   x = 4,018,985.98