Finding the Third Proportional to 355,864.50 and 777,393

Step by Step Solution

1. Step 1: Write the proportion equation
   355,864.50 : 777,393 = 777,393 : x
2. Step 2: Convert to fraction form
   355,864.50/777,393 = 777,393/x
3. Step 3: Cross multiply
   355,864.50x = 777,393 × 777,393
4. Step 4: Simplify right side
   355,864.50x = 604,339,876,449
5. Step 5: Solve for x
   x = 604,339,876,449/355,864.50
6. Step 6: Final answer
   x = 1,698,230.30