Finding the Third Proportional to 554,559 and 828,142

Step by Step Solution

1. Step 1: Write the proportion equation
   554,559 : 828,142 = 828,142 : x
2. Step 2: Convert to fraction form
   554,559/828,142 = 828,142/x
3. Step 3: Cross multiply
   554,559x = 828,142 × 828,142
4. Step 4: Simplify right side
   554,559x = 685,819,172,164
5. Step 5: Solve for x
   x = 685,819,172,164/554,559
6. Step 6: Final answer
   x = 1,236,692.89