Finding the Third Proportional to 878,998 and 1,865,911

Step by Step Solution

1. Step 1: Write the proportion equation
   878,998 : 1,865,911 = 1,865,911 : x
2. Step 2: Convert to fraction form
   878,998/1,865,911 = 1,865,911/x
3. Step 3: Cross multiply
   878,998x = 1,865,911 × 1,865,911
4. Step 4: Simplify right side
   878,998x = 3,481,623,859,921
5. Step 5: Solve for x
   x = 3,481,623,859,921/878,998
6. Step 6: Final answer
   x = 3,960,900.78