Finding the Third Proportional to 389,111 and 852,036

Step by Step Solution

1. Step 1: Write the proportion equation
   389,111 : 852,036 = 852,036 : x
2. Step 2: Convert to fraction form
   389,111/852,036 = 852,036/x
3. Step 3: Cross multiply
   389,111x = 852,036 × 852,036
4. Step 4: Simplify right side
   389,111x = 725,965,345,296
5. Step 5: Solve for x
   x = 725,965,345,296/389,111
6. Step 6: Final answer
   x = 1,865,702.45