Finding the Third Proportional to 302,515.50 and 664,081.50

Step by Step Solution

1. Step 1: Write the proportion equation
   302,515.50 : 664,081.50 = 664,081.50 : x
2. Step 2: Convert to fraction form
   302,515.50/664,081.50 = 664,081.50/x
3. Step 3: Cross multiply
   302,515.50x = 664,081.50 × 664,081.50
4. Step 4: Simplify right side
   302,515.50x = 441,004,238,642.25
5. Step 5: Solve for x
   x = 441,004,238,642.25/302,515.50
6. Step 6: Final answer
   x = 1,457,790.56