Finding the Third Proportional to 1,355,978 and 1,839,507

Step by Step Solution

1. Step 1: Write the proportion equation
   1,355,978 : 1,839,507 = 1,839,507 : x
2. Step 2: Convert to fraction form
   1,355,978/1,839,507 = 1,839,507/x
3. Step 3: Cross multiply
   1,355,978x = 1,839,507 × 1,839,507
4. Step 4: Simplify right side
   1,355,978x = 3,383,786,003,049
5. Step 5: Solve for x
   x = 3,383,786,003,049/1,355,978
6. Step 6: Final answer
   x = 2,495,457.89