Finding the Third Proportional to 309,798 and 677,916

Step by Step Solution

1. Step 1: Write the proportion equation
   309,798 : 677,916 = 677,916 : x
2. Step 2: Convert to fraction form
   309,798/677,916 = 677,916/x
3. Step 3: Cross multiply
   309,798x = 677,916 × 677,916
4. Step 4: Simplify right side
   309,798x = 459,570,103,056
5. Step 5: Solve for x
   x = 459,570,103,056/309,798
6. Step 6: Final answer
   x = 1,483,450.84