Finding the Third Proportional to 431,581.50 and 677,011.50

Step by Step Solution

1. Step 1: Write the proportion equation
   431,581.50 : 677,011.50 = 677,011.50 : x
2. Step 2: Convert to fraction form
   431,581.50/677,011.50 = 677,011.50/x
3. Step 3: Cross multiply
   431,581.50x = 677,011.50 × 677,011.50
4. Step 4: Simplify right side
   431,581.50x = 458,344,571,132.25
5. Step 5: Solve for x
   x = 458,344,571,132.25/431,581.50
6. Step 6: Final answer
   x = 1,062,011.63