Finding the Third Proportional to 388,830 and 804,654

Step by Step Solution

1. Step 1: Write the proportion equation
   388,830 : 804,654 = 804,654 : x
2. Step 2: Convert to fraction form
   388,830/804,654 = 804,654/x
3. Step 3: Cross multiply
   388,830x = 804,654 × 804,654
4. Step 4: Simplify right side
   388,830x = 647,468,059,716
5. Step 5: Solve for x
   x = 647,468,059,716/388,830
6. Step 6: Final answer
   x = 1,665,170.02