Finding the Third Proportional to 612,144 and 1,322,649

Step by Step Solution

1. Step 1: Write the proportion equation
   612,144 : 1,322,649 = 1,322,649 : x
2. Step 2: Convert to fraction form
   612,144/1,322,649 = 1,322,649/x
3. Step 3: Cross multiply
   612,144x = 1,322,649 × 1,322,649
4. Step 4: Simplify right side
   612,144x = 1,749,400,377,201
5. Step 5: Solve for x
   x = 1,749,400,377,201/612,144
6. Step 6: Final answer
   x = 2,857,824.92