Finding the Third Proportional to 446,335 and 689,605.50

Step by Step Solution

1. Step 1: Write the proportion equation
   446,335 : 689,605.50 = 689,605.50 : x
2. Step 2: Convert to fraction form
   446,335/689,605.50 = 689,605.50/x
3. Step 3: Cross multiply
   446,335x = 689,605.50 × 689,605.50
4. Step 4: Simplify right side
   446,335x = 475,555,745,630.25
5. Step 5: Solve for x
   x = 475,555,745,630.25/446,335
6. Step 6: Final answer
   x = 1,065,468.19