Finding the Third Proportional to 368,090.50 and 778,621

Step by Step Solution

1. Step 1: Write the proportion equation
   368,090.50 : 778,621 = 778,621 : x
2. Step 2: Convert to fraction form
   368,090.50/778,621 = 778,621/x
3. Step 3: Cross multiply
   368,090.50x = 778,621 × 778,621
4. Step 4: Simplify right side
   368,090.50x = 606,250,661,641
5. Step 5: Solve for x
   x = 606,250,661,641/368,090.50
6. Step 6: Final answer
   x = 1,647,015.24