Finding the Third Proportional to 302,656.50 and 664,089

Step by Step Solution

1. Step 1: Write the proportion equation
   302,656.50 : 664,089 = 664,089 : x
2. Step 2: Convert to fraction form
   302,656.50/664,089 = 664,089/x
3. Step 3: Cross multiply
   302,656.50x = 664,089 × 664,089
4. Step 4: Simplify right side
   302,656.50x = 441,014,199,921
5. Step 5: Solve for x
   x = 441,014,199,921/302,656.50
6. Step 6: Final answer
   x = 1,457,144.32