Finding the Third Proportional to 111,256 and 231,720

Step by Step Solution

1. Step 1: Write the proportion equation
   111,256 : 231,720 = 231,720 : x
2. Step 2: Convert to fraction form
   111,256/231,720 = 231,720/x
3. Step 3: Cross multiply
   111,256x = 231,720 × 231,720
4. Step 4: Simplify right side
   111,256x = 53,694,158,400
5. Step 5: Solve for x
   x = 53,694,158,400/111,256
6. Step 6: Final answer
   x = 482,618.09