Finding the Third Proportional to 447,321 and 664,906.50

Step by Step Solution

1. Step 1: Write the proportion equation
   447,321 : 664,906.50 = 664,906.50 : x
2. Step 2: Convert to fraction form
   447,321/664,906.50 = 664,906.50/x
3. Step 3: Cross multiply
   447,321x = 664,906.50 × 664,906.50
4. Step 4: Simplify right side
   447,321x = 442,100,653,742.25
5. Step 5: Solve for x
   x = 442,100,653,742.25/447,321
6. Step 6: Final answer
   x = 988,329.75