Finding the Third Proportional to 1,018,780 and 1,378,701

Step by Step Solution

1. Step 1: Write the proportion equation
   1,018,780 : 1,378,701 = 1,378,701 : x
2. Step 2: Convert to fraction form
   1,018,780/1,378,701 = 1,378,701/x
3. Step 3: Cross multiply
   1,018,780x = 1,378,701 × 1,378,701
4. Step 4: Simplify right side
   1,018,780x = 1,900,816,447,401
5. Step 5: Solve for x
   x = 1,900,816,447,401/1,018,780
6. Step 6: Final answer
   x = 1,865,777.15