Finding the Third Proportional to 258,606 and 548,308

Step by Step Solution

1. Step 1: Write the proportion equation
   258,606 : 548,308 = 548,308 : x
2. Step 2: Convert to fraction form
   258,606/548,308 = 548,308/x
3. Step 3: Cross multiply
   258,606x = 548,308 × 548,308
4. Step 4: Simplify right side
   258,606x = 300,641,662,864
5. Step 5: Solve for x
   x = 300,641,662,864/258,606
6. Step 6: Final answer
   x = 1,162,547.13