Finding the Third Proportional to 401,431.50 and 587,072.25

Step by Step Solution

1. Step 1: Write the proportion equation
   401,431.50 : 587,072.25 = 587,072.25 : x
2. Step 2: Convert to fraction form
   401,431.50/587,072.25 = 587,072.25/x
3. Step 3: Cross multiply
   401,431.50x = 587,072.25 × 587,072.25
4. Step 4: Simplify right side
   401,431.50x = 344,653,826,720.06
5. Step 5: Solve for x
   x = 344,653,826,720.06/401,431.50
6. Step 6: Final answer
   x = 858,561.99