Finding the Third Proportional to 390,651 and 587,016

Step by Step Solution

1. Step 1: Write the proportion equation
   390,651 : 587,016 = 587,016 : x
2. Step 2: Convert to fraction form
   390,651/587,016 = 587,016/x
3. Step 3: Cross multiply
   390,651x = 587,016 × 587,016
4. Step 4: Simplify right side
   390,651x = 344,587,784,256
5. Step 5: Solve for x
   x = 344,587,784,256/390,651
6. Step 6: Final answer
   x = 882,086.02