Finding the Third Proportional to 664,389 and 936,229.50

Step by Step Solution

1. Step 1: Write the proportion equation
   664,389 : 936,229.50 = 936,229.50 : x
2. Step 2: Convert to fraction form
   664,389/936,229.50 = 936,229.50/x
3. Step 3: Cross multiply
   664,389x = 936,229.50 × 936,229.50
4. Step 4: Simplify right side
   664,389x = 876,525,676,670.25
5. Step 5: Solve for x
   x = 876,525,676,670.25/664,389
6. Step 6: Final answer
   x = 1,319,295.89