Finding the Third Proportional to 258,514.50 and 388,044

Step by Step Solution

1. Step 1: Write the proportion equation
   258,514.50 : 388,044 = 388,044 : x
2. Step 2: Convert to fraction form
   258,514.50/388,044 = 388,044/x
3. Step 3: Cross multiply
   258,514.50x = 388,044 × 388,044
4. Step 4: Simplify right side
   258,514.50x = 150,578,145,936
5. Step 5: Solve for x
   x = 150,578,145,936/258,514.50
6. Step 6: Final answer
   x = 582,474.66