Finding the Third Proportional to 307,064.50 and 451,815.50

Step by Step Solution

1. Step 1: Write the proportion equation
   307,064.50 : 451,815.50 = 451,815.50 : x
2. Step 2: Convert to fraction form
   307,064.50/451,815.50 = 451,815.50/x
3. Step 3: Cross multiply
   307,064.50x = 451,815.50 × 451,815.50
4. Step 4: Simplify right side
   307,064.50x = 204,137,246,040.25
5. Step 5: Solve for x
   x = 204,137,246,040.25/307,064.50
6. Step 6: Final answer
   x = 664,802.50