Finding the Third Proportional to 449,929 and 978,590

Step by Step Solution

1. Step 1: Write the proportion equation
   449,929 : 978,590 = 978,590 : x
2. Step 2: Convert to fraction form
   449,929/978,590 = 978,590/x
3. Step 3: Cross multiply
   449,929x = 978,590 × 978,590
4. Step 4: Simplify right side
   449,929x = 957,638,388,100
5. Step 5: Solve for x
   x = 957,638,388,100/449,929
6. Step 6: Final answer
   x = 2,128,421.12