Finding the Third Proportional to 447,390 and 677,596.50

Step by Step Solution

1. Step 1: Write the proportion equation
   447,390 : 677,596.50 = 677,596.50 : x
2. Step 2: Convert to fraction form
   447,390/677,596.50 = 677,596.50/x
3. Step 3: Cross multiply
   447,390x = 677,596.50 × 677,596.50
4. Step 4: Simplify right side
   447,390x = 459,137,016,812.25
5. Step 5: Solve for x
   x = 459,137,016,812.25/447,390
6. Step 6: Final answer
   x = 1,026,256.77