Finding the Third Proportional to 549,013 and 820,287

Step by Step Solution

1. Step 1: Write the proportion equation
   549,013 : 820,287 = 820,287 : x
2. Step 2: Convert to fraction form
   549,013/820,287 = 820,287/x
3. Step 3: Cross multiply
   549,013x = 820,287 × 820,287
4. Step 4: Simplify right side
   549,013x = 672,870,762,369
5. Step 5: Solve for x
   x = 672,870,762,369/549,013
6. Step 6: Final answer
   x = 1,225,600.78