Finding the Third Proportional to 687,820.50 and 773,113.50

Step by Step Solution

1. Step 1: Write the proportion equation
   687,820.50 : 773,113.50 = 773,113.50 : x
2. Step 2: Convert to fraction form
   687,820.50/773,113.50 = 773,113.50/x
3. Step 3: Cross multiply
   687,820.50x = 773,113.50 × 773,113.50
4. Step 4: Simplify right side
   687,820.50x = 597,704,483,882.25
5. Step 5: Solve for x
   x = 597,704,483,882.25/687,820.50
6. Step 6: Final answer
   x = 868,983.24