Finding the Third Proportional to 1,638,576 and 3,355,866

Step by Step Solution

1. Step 1: Write the proportion equation
   1,638,576 : 3,355,866 = 3,355,866 : x
2. Step 2: Convert to fraction form
   1,638,576/3,355,866 = 3,355,866/x
3. Step 3: Cross multiply
   1,638,576x = 3,355,866 × 3,355,866
4. Step 4: Simplify right side
   1,638,576x = 11,261,836,609,956
5. Step 5: Solve for x
   x = 11,261,836,609,956/1,638,576
6. Step 6: Final answer
   x = 6,872,941.27