Finding the Third Proportional to 257,566.50 and 558,009

Step by Step Solution

1. Step 1: Write the proportion equation
   257,566.50 : 558,009 = 558,009 : x
2. Step 2: Convert to fraction form
   257,566.50/558,009 = 558,009/x
3. Step 3: Cross multiply
   257,566.50x = 558,009 × 558,009
4. Step 4: Simplify right side
   257,566.50x = 311,374,044,081
5. Step 5: Solve for x
   x = 311,374,044,081/257,566.50
6. Step 6: Final answer
   x = 1,208,907.39