Finding the Third Proportional to 373,866 and 815,401.50

Step by Step Solution

1. Step 1: Write the proportion equation
   373,866 : 815,401.50 = 815,401.50 : x
2. Step 2: Convert to fraction form
   373,866/815,401.50 = 815,401.50/x
3. Step 3: Cross multiply
   373,866x = 815,401.50 × 815,401.50
4. Step 4: Simplify right side
   373,866x = 664,879,606,202.25
5. Step 5: Solve for x
   x = 664,879,606,202.25/373,866
6. Step 6: Final answer
   x = 1,778,390.13