Finding the Third Proportional to 389,695.50 and 810,013.50

Step by Step Solution

1. Step 1: Write the proportion equation
   389,695.50 : 810,013.50 = 810,013.50 : x
2. Step 2: Convert to fraction form
   389,695.50/810,013.50 = 810,013.50/x
3. Step 3: Cross multiply
   389,695.50x = 810,013.50 × 810,013.50
4. Step 4: Simplify right side
   389,695.50x = 656,121,870,182.25
5. Step 5: Solve for x
   x = 656,121,870,182.25/389,695.50
6. Step 6: Final answer
   x = 1,683,678.33