Finding the Third Proportional to 1,213,856 and 2,659,912

Step by Step Solution

1. Step 1: Write the proportion equation
   1,213,856 : 2,659,912 = 2,659,912 : x
2. Step 2: Convert to fraction form
   1,213,856/2,659,912 = 2,659,912/x
3. Step 3: Cross multiply
   1,213,856x = 2,659,912 × 2,659,912
4. Step 4: Simplify right side
   1,213,856x = 7,075,131,847,744
5. Step 5: Solve for x
   x = 7,075,131,847,744/1,213,856
6. Step 6: Final answer
   x = 5,828,641.82