Finding the Third Proportional to 389,819 and 839,794.50

Step by Step Solution

1. Step 1: Write the proportion equation
   389,819 : 839,794.50 = 839,794.50 : x
2. Step 2: Convert to fraction form
   389,819/839,794.50 = 839,794.50/x
3. Step 3: Cross multiply
   389,819x = 839,794.50 × 839,794.50
4. Step 4: Simplify right side
   389,819x = 705,254,802,230.25
5. Step 5: Solve for x
   x = 705,254,802,230.25/389,819
6. Step 6: Final answer
   x = 1,809,185.29