Finding the Third Proportional to 111,454 and 243,218

Step by Step Solution

1. Step 1: Write the proportion equation
   111,454 : 243,218 = 243,218 : x
2. Step 2: Convert to fraction form
   111,454/243,218 = 243,218/x
3. Step 3: Cross multiply
   111,454x = 243,218 × 243,218
4. Step 4: Simplify right side
   111,454x = 59,154,995,524
5. Step 5: Solve for x
   x = 59,154,995,524/111,454
6. Step 6: Final answer
   x = 530,757.04