Finding the Third Proportional to 451,647 and 664,987.50

Step by Step Solution

1. Step 1: Write the proportion equation
   451,647 : 664,987.50 = 664,987.50 : x
2. Step 2: Convert to fraction form
   451,647/664,987.50 = 664,987.50/x
3. Step 3: Cross multiply
   451,647x = 664,987.50 × 664,987.50
4. Step 4: Simplify right side
   451,647x = 442,208,375,156.25
5. Step 5: Solve for x
   x = 442,208,375,156.25/451,647
6. Step 6: Final answer
   x = 979,101.77