Finding the Third Proportional to 287,046 and 629,040.38

Step by Step Solution

1. Step 1: Write the proportion equation
   287,046 : 629,040.38 = 629,040.38 : x
2. Step 2: Convert to fraction form
   287,046/629,040.38 = 629,040.38/x
3. Step 3: Cross multiply
   287,046x = 629,040.38 × 629,040.38
4. Step 4: Simplify right side
   287,046x = 395,691,793,380.14
5. Step 5: Solve for x
   x = 395,691,793,380.14/287,046
6. Step 6: Final answer
   x = 1,378,496.11