Finding the Third Proportional to 389,615 and 845,662

Step by Step Solution

1. Step 1: Write the proportion equation
   389,615 : 845,662 = 845,662 : x
2. Step 2: Convert to fraction form
   389,615/845,662 = 845,662/x
3. Step 3: Cross multiply
   389,615x = 845,662 × 845,662
4. Step 4: Simplify right side
   389,615x = 715,144,218,244
5. Step 5: Solve for x
   x = 715,144,218,244/389,615
6. Step 6: Final answer
   x = 1,835,515.11