Finding the Third Proportional to 253,412 and 550,636

Step by Step Solution

1. Step 1: Write the proportion equation
   253,412 : 550,636 = 550,636 : x
2. Step 2: Convert to fraction form
   253,412/550,636 = 550,636/x
3. Step 3: Cross multiply
   253,412x = 550,636 × 550,636
4. Step 4: Simplify right side
   253,412x = 303,200,004,496
5. Step 5: Solve for x
   x = 303,200,004,496/253,412
6. Step 6: Final answer
   x = 1,196,470.59