Finding the Third Proportional to 401,443 and 587,090

Step by Step Solution

1. Step 1: Write the proportion equation
   401,443 : 587,090 = 587,090 : x
2. Step 2: Convert to fraction form
   401,443/587,090 = 587,090/x
3. Step 3: Cross multiply
   401,443x = 587,090 × 587,090
4. Step 4: Simplify right side
   401,443x = 344,674,668,100
5. Step 5: Solve for x
   x = 344,674,668,100/401,443
6. Step 6: Final answer
   x = 858,589.31