Finding the Third Proportional to 285,642 and 667,570.50

Step by Step Solution

1. Step 1: Write the proportion equation
   285,642 : 667,570.50 = 667,570.50 : x
2. Step 2: Convert to fraction form
   285,642/667,570.50 = 667,570.50/x
3. Step 3: Cross multiply
   285,642x = 667,570.50 × 667,570.50
4. Step 4: Simplify right side
   285,642x = 445,650,372,470.25
5. Step 5: Solve for x
   x = 445,650,372,470.25/285,642
6. Step 6: Final answer
   x = 1,560,171.03