Finding the Third Proportional to 113,139 and 223,420.50

Step by Step Solution

1. Step 1: Write the proportion equation
   113,139 : 223,420.50 = 223,420.50 : x
2. Step 2: Convert to fraction form
   113,139/223,420.50 = 223,420.50/x
3. Step 3: Cross multiply
   113,139x = 223,420.50 × 223,420.50
4. Step 4: Simplify right side
   113,139x = 49,916,719,820.25
5. Step 5: Solve for x
   x = 49,916,719,820.25/113,139
6. Step 6: Final answer
   x = 441,198.17