Finding the Third Proportional to 406,947 and 851,070

Step by Step Solution

1. Step 1: Write the proportion equation
   406,947 : 851,070 = 851,070 : x
2. Step 2: Convert to fraction form
   406,947/851,070 = 851,070/x
3. Step 3: Cross multiply
   406,947x = 851,070 × 851,070
4. Step 4: Simplify right side
   406,947x = 724,320,144,900
5. Step 5: Solve for x
   x = 724,320,144,900/406,947
6. Step 6: Final answer
   x = 1,779,888.15