Finding the Third Proportional to 577,717 and 868,357.50

Step by Step Solution

1. Step 1: Write the proportion equation
   577,717 : 868,357.50 = 868,357.50 : x
2. Step 2: Convert to fraction form
   577,717/868,357.50 = 868,357.50/x
3. Step 3: Cross multiply
   577,717x = 868,357.50 × 868,357.50
4. Step 4: Simplify right side
   577,717x = 754,044,747,806.25
5. Step 5: Solve for x
   x = 754,044,747,806.25/577,717
6. Step 6: Final answer
   x = 1,305,214.75