Finding the Third Proportional to 388,955 and 804,910

Step by Step Solution

1. Step 1: Write the proportion equation
   388,955 : 804,910 = 804,910 : x
2. Step 2: Convert to fraction form
   388,955/804,910 = 804,910/x
3. Step 3: Cross multiply
   388,955x = 804,910 × 804,910
4. Step 4: Simplify right side
   388,955x = 647,880,108,100
5. Step 5: Solve for x
   x = 647,880,108,100/388,955
6. Step 6: Final answer
   x = 1,665,694.25