Finding the Third Proportional to 339,559 and 459,514.50

Step by Step Solution

1. Step 1: Write the proportion equation
   339,559 : 459,514.50 = 459,514.50 : x
2. Step 2: Convert to fraction form
   339,559/459,514.50 = 459,514.50/x
3. Step 3: Cross multiply
   339,559x = 459,514.50 × 459,514.50
4. Step 4: Simplify right side
   339,559x = 211,153,575,710.25
5. Step 5: Solve for x
   x = 211,153,575,710.25/339,559
6. Step 6: Final answer
   x = 621,846.50