Finding the Third Proportional to 354,472.50 and 777,831

Step by Step Solution

1. Step 1: Write the proportion equation
   354,472.50 : 777,831 = 777,831 : x
2. Step 2: Convert to fraction form
   354,472.50/777,831 = 777,831/x
3. Step 3: Cross multiply
   354,472.50x = 777,831 × 777,831
4. Step 4: Simplify right side
   354,472.50x = 605,021,064,561
5. Step 5: Solve for x
   x = 605,021,064,561/354,472.50
6. Step 6: Final answer
   x = 1,706,820.88