Finding the Third Proportional to 356,622 and 777,215.50

Step by Step Solution

1. Step 1: Write the proportion equation
   356,622 : 777,215.50 = 777,215.50 : x
2. Step 2: Convert to fraction form
   356,622/777,215.50 = 777,215.50/x
3. Step 3: Cross multiply
   356,622x = 777,215.50 × 777,215.50
4. Step 4: Simplify right side
   356,622x = 604,063,933,440.25
5. Step 5: Solve for x
   x = 604,063,933,440.25/356,622
6. Step 6: Final answer
   x = 1,693,849.32