Finding the Third Proportional to 389,214 and 842,398.50

Step by Step Solution

1. Step 1: Write the proportion equation
   389,214 : 842,398.50 = 842,398.50 : x
2. Step 2: Convert to fraction form
   389,214/842,398.50 = 842,398.50/x
3. Step 3: Cross multiply
   389,214x = 842,398.50 × 842,398.50
4. Step 4: Simplify right side
   389,214x = 709,635,232,802.25
5. Step 5: Solve for x
   x = 709,635,232,802.25/389,214
6. Step 6: Final answer
   x = 1,823,252.07