Finding the Third Proportional to 456,648 and 990,384

Step by Step Solution

1. Step 1: Write the proportion equation
   456,648 : 990,384 = 990,384 : x
2. Step 2: Convert to fraction form
   456,648/990,384 = 990,384/x
3. Step 3: Cross multiply
   456,648x = 990,384 × 990,384
4. Step 4: Simplify right side
   456,648x = 980,860,467,456
5. Step 5: Solve for x
   x = 980,860,467,456/456,648
6. Step 6: Final answer
   x = 2,147,957.44