Finding the Third Proportional to 258,180 and 559,249.50

Step by Step Solution

1. Step 1: Write the proportion equation
   258,180 : 559,249.50 = 559,249.50 : x
2. Step 2: Convert to fraction form
   258,180/559,249.50 = 559,249.50/x
3. Step 3: Cross multiply
   258,180x = 559,249.50 × 559,249.50
4. Step 4: Simplify right side
   258,180x = 312,760,003,250.25
5. Step 5: Solve for x
   x = 312,760,003,250.25/258,180
6. Step 6: Final answer
   x = 1,211,402.91