Finding the Third Proportional to 399,581 and 850,016

Step by Step Solution

1. Step 1: Write the proportion equation
   399,581 : 850,016 = 850,016 : x
2. Step 2: Convert to fraction form
   399,581/850,016 = 850,016/x
3. Step 3: Cross multiply
   399,581x = 850,016 × 850,016
4. Step 4: Simplify right side
   399,581x = 722,527,200,256
5. Step 5: Solve for x
   x = 722,527,200,256/399,581
6. Step 6: Final answer
   x = 1,808,212.10