Finding the Third Proportional to 285,067.50 and 619,417.50

Step by Step Solution

1. Step 1: Write the proportion equation
   285,067.50 : 619,417.50 = 619,417.50 : x
2. Step 2: Convert to fraction form
   285,067.50/619,417.50 = 619,417.50/x
3. Step 3: Cross multiply
   285,067.50x = 619,417.50 × 619,417.50
4. Step 4: Simplify right side
   285,067.50x = 383,678,039,306.25
5. Step 5: Solve for x
   x = 383,678,039,306.25/285,067.50
6. Step 6: Final answer
   x = 1,345,919.96