Finding the Third Proportional to 389,109 and 852,031.50

Step by Step Solution

1. Step 1: Write the proportion equation
   389,109 : 852,031.50 = 852,031.50 : x
2. Step 2: Convert to fraction form
   389,109/852,031.50 = 852,031.50/x
3. Step 3: Cross multiply
   389,109x = 852,031.50 × 852,031.50
4. Step 4: Simplify right side
   389,109x = 725,957,676,992.25
5. Step 5: Solve for x
   x = 725,957,676,992.25/389,109
6. Step 6: Final answer
   x = 1,865,692.33