Finding the Third Proportional to 555,618 and 829,768.50

Step by Step Solution

1. Step 1: Write the proportion equation
   555,618 : 829,768.50 = 829,768.50 : x
2. Step 2: Convert to fraction form
   555,618/829,768.50 = 829,768.50/x
3. Step 3: Cross multiply
   555,618x = 829,768.50 × 829,768.50
4. Step 4: Simplify right side
   555,618x = 688,515,763,592.25
5. Step 5: Solve for x
   x = 688,515,763,592.25/555,618
6. Step 6: Final answer
   x = 1,239,189.09