Finding the Third Proportional to 258,514.03 and 558,535.50

Step by Step Solution

1. Step 1: Write the proportion equation
   258,514.03 : 558,535.50 = 558,535.50 : x
2. Step 2: Convert to fraction form
   258,514.03/558,535.50 = 558,535.50/x
3. Step 3: Cross multiply
   258,514.03x = 558,535.50 × 558,535.50
4. Step 4: Simplify right side
   258,514.03x = 311,961,904,760.25
5. Step 5: Solve for x
   x = 311,961,904,760.25/258,514.03
6. Step 6: Final answer
   x = 1,206,750.38