Finding the Third Proportional to 361,144.50 and 777,789

Step by Step Solution

1. Step 1: Write the proportion equation
   361,144.50 : 777,789 = 777,789 : x
2. Step 2: Convert to fraction form
   361,144.50/777,789 = 777,789/x
3. Step 3: Cross multiply
   361,144.50x = 777,789 × 777,789
4. Step 4: Simplify right side
   361,144.50x = 604,955,728,521
5. Step 5: Solve for x
   x = 604,955,728,521/361,144.50
6. Step 6: Final answer
   x = 1,675,107.13