Finding the Third Proportional to 111,667 and 243,021

Step by Step Solution

1. Step 1: Write the proportion equation
   111,667 : 243,021 = 243,021 : x
2. Step 2: Convert to fraction form
   111,667/243,021 = 243,021/x
3. Step 3: Cross multiply
   111,667x = 243,021 × 243,021
4. Step 4: Simplify right side
   111,667x = 59,059,206,441
5. Step 5: Solve for x
   x = 59,059,206,441/111,667
6. Step 6: Final answer
   x = 528,886.84