Finding the Third Proportional to 231,216 and 476,256

Step by Step Solution

1. Step 1: Write the proportion equation
   231,216 : 476,256 = 476,256 : x
2. Step 2: Convert to fraction form
   231,216/476,256 = 476,256/x
3. Step 3: Cross multiply
   231,216x = 476,256 × 476,256
4. Step 4: Simplify right side
   231,216x = 226,819,777,536
5. Step 5: Solve for x
   x = 226,819,777,536/231,216
6. Step 6: Final answer
   x = 980,986.51