Finding the Third Proportional to 1,218,318 and 2,679,636

Step by Step Solution

1. Step 1: Write the proportion equation
   1,218,318 : 2,679,636 = 2,679,636 : x
2. Step 2: Convert to fraction form
   1,218,318/2,679,636 = 2,679,636/x
3. Step 3: Cross multiply
   1,218,318x = 2,679,636 × 2,679,636
4. Step 4: Simplify right side
   1,218,318x = 7,180,449,092,496
5. Step 5: Solve for x
   x = 7,180,449,092,496/1,218,318
6. Step 6: Final answer
   x = 5,893,739.64