Finding the Third Proportional to 434,320 and 664,396.50

Step by Step Solution

1. Step 1: Write the proportion equation
   434,320 : 664,396.50 = 664,396.50 : x
2. Step 2: Convert to fraction form
   434,320/664,396.50 = 664,396.50/x
3. Step 3: Cross multiply
   434,320x = 664,396.50 × 664,396.50
4. Step 4: Simplify right side
   434,320x = 441,422,709,212.25
5. Step 5: Solve for x
   x = 441,422,709,212.25/434,320
6. Step 6: Final answer
   x = 1,016,353.63