Finding the Third Proportional to 1,640,655 and 2,567,840

Step by Step Solution

1. Step 1: Write the proportion equation
   1,640,655 : 2,567,840 = 2,567,840 : x
2. Step 2: Convert to fraction form
   1,640,655/2,567,840 = 2,567,840/x
3. Step 3: Cross multiply
   1,640,655x = 2,567,840 × 2,567,840
4. Step 4: Simplify right side
   1,640,655x = 6,593,802,265,600
5. Step 5: Solve for x
   x = 6,593,802,265,600/1,640,655
6. Step 6: Final answer
   x = 4,019,005.99