Finding the Third Proportional to 111,469 and 242,619

Step by Step Solution

1. Step 1: Write the proportion equation
   111,469 : 242,619 = 242,619 : x
2. Step 2: Convert to fraction form
   111,469/242,619 = 242,619/x
3. Step 3: Cross multiply
   111,469x = 242,619 × 242,619
4. Step 4: Simplify right side
   111,469x = 58,863,979,161
5. Step 5: Solve for x
   x = 58,863,979,161/111,469
6. Step 6: Final answer
   x = 528,074.88