Finding the Third Proportional to 113,618 and 243,684

Step by Step Solution

1. Step 1: Write the proportion equation
   113,618 : 243,684 = 243,684 : x
2. Step 2: Convert to fraction form
   113,618/243,684 = 243,684/x
3. Step 3: Cross multiply
   113,618x = 243,684 × 243,684
4. Step 4: Simplify right side
   113,618x = 59,381,891,856
5. Step 5: Solve for x
   x = 59,381,891,856/113,618
6. Step 6: Final answer
   x = 522,645.11