Finding the Third Proportional to 111,271 and 247,419

Step by Step Solution

1. Step 1: Write the proportion equation
   111,271 : 247,419 = 247,419 : x
2. Step 2: Convert to fraction form
   111,271/247,419 = 247,419/x
3. Step 3: Cross multiply
   111,271x = 247,419 × 247,419
4. Step 4: Simplify right side
   111,271x = 61,216,161,561
5. Step 5: Solve for x
   x = 61,216,161,561/111,271
6. Step 6: Final answer
   x = 550,153.78