Finding the Third Proportional to 111,885 and 243,249

Step by Step Solution

1. Step 1: Write the proportion equation
   111,885 : 243,249 = 243,249 : x
2. Step 2: Convert to fraction form
   111,885/243,249 = 243,249/x
3. Step 3: Cross multiply
   111,885x = 243,249 × 243,249
4. Step 4: Simplify right side
   111,885x = 59,170,076,001
5. Step 5: Solve for x
   x = 59,170,076,001/111,885
6. Step 6: Final answer
   x = 528,847.26