Finding the Third Proportional to 386,179.50 and 807,648

Step by Step Solution

1. Step 1: Write the proportion equation
   386,179.50 : 807,648 = 807,648 : x
2. Step 2: Convert to fraction form
   386,179.50/807,648 = 807,648/x
3. Step 3: Cross multiply
   386,179.50x = 807,648 × 807,648
4. Step 4: Simplify right side
   386,179.50x = 652,295,291,904
5. Step 5: Solve for x
   x = 652,295,291,904/386,179.50
6. Step 6: Final answer
   x = 1,689,098.70