Finding the Third Proportional to 354,564 and 778,018.50

Step by Step Solution

1. Step 1: Write the proportion equation
   354,564 : 778,018.50 = 778,018.50 : x
2. Step 2: Convert to fraction form
   354,564/778,018.50 = 778,018.50/x
3. Step 3: Cross multiply
   354,564x = 778,018.50 × 778,018.50
4. Step 4: Simplify right side
   354,564x = 605,312,786,342.25
5. Step 5: Solve for x
   x = 605,312,786,342.25/354,564
6. Step 6: Final answer
   x = 1,707,203.17