Finding the Third Proportional to 113,143 and 223,428

Step by Step Solution

1. Step 1: Write the proportion equation
   113,143 : 223,428 = 223,428 : x
2. Step 2: Convert to fraction form
   113,143/223,428 = 223,428/x
3. Step 3: Cross multiply
   113,143x = 223,428 × 223,428
4. Step 4: Simplify right side
   113,143x = 49,920,071,184
5. Step 5: Solve for x
   x = 49,920,071,184/113,143
6. Step 6: Final answer
   x = 441,212.19