Finding the Third Proportional to 397,191 and 851,238

Step by Step Solution

1. Step 1: Write the proportion equation
   397,191 : 851,238 = 851,238 : x
2. Step 2: Convert to fraction form
   397,191/851,238 = 851,238/x
3. Step 3: Cross multiply
   397,191x = 851,238 × 851,238
4. Step 4: Simplify right side
   397,191x = 724,606,132,644
5. Step 5: Solve for x
   x = 724,606,132,644/397,191
6. Step 6: Final answer
   x = 1,824,326.67