Finding the Third Proportional to 401,665.50 and 587,105.30

Step by Step Solution

1. Step 1: Write the proportion equation
   401,665.50 : 587,105.30 = 587,105.30 : x
2. Step 2: Convert to fraction form
   401,665.50/587,105.30 = 587,105.30/x
3. Step 3: Cross multiply
   401,665.50x = 587,105.30 × 587,105.30
4. Step 4: Simplify right side
   401,665.50x = 344,692,629,618.68
5. Step 5: Solve for x
   x = 344,692,629,618.68/401,665.50
6. Step 6: Final answer
   x = 858,158.42