Finding the Third Proportional to 445,193 and 689,777.50

Step by Step Solution

1. Step 1: Write the proportion equation
   445,193 : 689,777.50 = 689,777.50 : x
2. Step 2: Convert to fraction form
   445,193/689,777.50 = 689,777.50/x
3. Step 3: Cross multiply
   445,193x = 689,777.50 × 689,777.50
4. Step 4: Simplify right side
   445,193x = 475,792,999,506.25
5. Step 5: Solve for x
   x = 475,792,999,506.25/445,193
6. Step 6: Final answer
   x = 1,068,734.23