Finding the Third Proportional to 389,460 and 851,010

Step by Step Solution

1. Step 1: Write the proportion equation
   389,460 : 851,010 = 851,010 : x
2. Step 2: Convert to fraction form
   389,460/851,010 = 851,010/x
3. Step 3: Cross multiply
   389,460x = 851,010 × 851,010
4. Step 4: Simplify right side
   389,460x = 724,218,020,100
5. Step 5: Solve for x
   x = 724,218,020,100/389,460
6. Step 6: Final answer
   x = 1,859,544.04