Finding the Third Proportional to 389,338.50 and 863,223

Step by Step Solution

1. Step 1: Write the proportion equation
   389,338.50 : 863,223 = 863,223 : x
2. Step 2: Convert to fraction form
   389,338.50/863,223 = 863,223/x
3. Step 3: Cross multiply
   389,338.50x = 863,223 × 863,223
4. Step 4: Simplify right side
   389,338.50x = 745,153,947,729
5. Step 5: Solve for x
   x = 745,153,947,729/389,338.50
6. Step 6: Final answer
   x = 1,913,897.41