Finding the Third Proportional to 386,191.50 and 807,693

Step by Step Solution

1. Step 1: Write the proportion equation
   386,191.50 : 807,693 = 807,693 : x
2. Step 2: Convert to fraction form
   386,191.50/807,693 = 807,693/x
3. Step 3: Cross multiply
   386,191.50x = 807,693 × 807,693
4. Step 4: Simplify right side
   386,191.50x = 652,367,982,249
5. Step 5: Solve for x
   x = 652,367,982,249/386,191.50
6. Step 6: Final answer
   x = 1,689,234.44