Finding the Third Proportional to 113,138 and 223,419

Step by Step Solution

1. Step 1: Write the proportion equation
   113,138 : 223,419 = 223,419 : x
2. Step 2: Convert to fraction form
   113,138/223,419 = 223,419/x
3. Step 3: Cross multiply
   113,138x = 223,419 × 223,419
4. Step 4: Simplify right side
   113,138x = 49,916,049,561
5. Step 5: Solve for x
   x = 49,916,049,561/113,138
6. Step 6: Final answer
   x = 441,196.15