Finding the Third Proportional to 389,610 and 850,675.50

Step by Step Solution

1. Step 1: Write the proportion equation
   389,610 : 850,675.50 = 850,675.50 : x
2. Step 2: Convert to fraction form
   389,610/850,675.50 = 850,675.50/x
3. Step 3: Cross multiply
   389,610x = 850,675.50 × 850,675.50
4. Step 4: Simplify right side
   389,610x = 723,648,806,300.25
5. Step 5: Solve for x
   x = 723,648,806,300.25/389,610
6. Step 6: Final answer
   x = 1,857,367.13