Finding the Third Proportional to 561,788 and 1,228,678

Step by Step Solution

1. Step 1: Write the proportion equation
   561,788 : 1,228,678 = 1,228,678 : x
2. Step 2: Convert to fraction form
   561,788/1,228,678 = 1,228,678/x
3. Step 3: Cross multiply
   561,788x = 1,228,678 × 1,228,678
4. Step 4: Simplify right side
   561,788x = 1,509,649,627,684
5. Step 5: Solve for x
   x = 1,509,649,627,684/561,788
6. Step 6: Final answer
   x = 2,687,222.99