Finding the Third Proportional to 113,138.50 and 223,420

Step by Step Solution

1. Step 1: Write the proportion equation
   113,138.50 : 223,420 = 223,420 : x
2. Step 2: Convert to fraction form
   113,138.50/223,420 = 223,420/x
3. Step 3: Cross multiply
   113,138.50x = 223,420 × 223,420
4. Step 4: Simplify right side
   113,138.50x = 49,916,496,400
5. Step 5: Solve for x
   x = 49,916,496,400/113,138.50
6. Step 6: Final answer
   x = 441,198.15