Finding the Third Proportional to 389,116.50 and 838,266

Step by Step Solution

1. Step 1: Write the proportion equation
   389,116.50 : 838,266 = 838,266 : x
2. Step 2: Convert to fraction form
   389,116.50/838,266 = 838,266/x
3. Step 3: Cross multiply
   389,116.50x = 838,266 × 838,266
4. Step 4: Simplify right side
   389,116.50x = 702,689,886,756
5. Step 5: Solve for x
   x = 702,689,886,756/389,116.50
6. Step 6: Final answer
   x = 1,805,859.91