Finding the Third Proportional to 1,321,826 and 2,100,840

Step by Step Solution

1. Step 1: Write the proportion equation
   1,321,826 : 2,100,840 = 2,100,840 : x
2. Step 2: Convert to fraction form
   1,321,826/2,100,840 = 2,100,840/x
3. Step 3: Cross multiply
   1,321,826x = 2,100,840 × 2,100,840
4. Step 4: Simplify right side
   1,321,826x = 4,413,528,705,600
5. Step 5: Solve for x
   x = 4,413,528,705,600/1,321,826
6. Step 6: Final answer
   x = 3,338,963.45