Finding the Third Proportional to 371,644 and 815,468

Step by Step Solution

1. Step 1: Write the proportion equation
   371,644 : 815,468 = 815,468 : x
2. Step 2: Convert to fraction form
   371,644/815,468 = 815,468/x
3. Step 3: Cross multiply
   371,644x = 815,468 × 815,468
4. Step 4: Simplify right side
   371,644x = 664,988,059,024
5. Step 5: Solve for x
   x = 664,988,059,024/371,644
6. Step 6: Final answer
   x = 1,789,314.66