Finding the Third Proportional to 449,664 and 978,624

Step by Step Solution

1. Step 1: Write the proportion equation
   449,664 : 978,624 = 978,624 : x
2. Step 2: Convert to fraction form
   449,664/978,624 = 978,624/x
3. Step 3: Cross multiply
   449,664x = 978,624 × 978,624
4. Step 4: Simplify right side
   449,664x = 957,704,933,376
5. Step 5: Solve for x
   x = 957,704,933,376/449,664
6. Step 6: Final answer
   x = 2,129,823.45