Finding the Third Proportional to 629,138 and 1,368,864

Step by Step Solution

1. Step 1: Write the proportion equation
   629,138 : 1,368,864 = 1,368,864 : x
2. Step 2: Convert to fraction form
   629,138/1,368,864 = 1,368,864/x
3. Step 3: Cross multiply
   629,138x = 1,368,864 × 1,368,864
4. Step 4: Simplify right side
   629,138x = 1,873,788,650,496
5. Step 5: Solve for x
   x = 1,873,788,650,496/629,138
6. Step 6: Final answer
   x = 2,978,342.83