Finding the Third Proportional to 111,411 and 231,356

Step by Step Solution

1. Step 1: Write the proportion equation
   111,411 : 231,356 = 231,356 : x
2. Step 2: Convert to fraction form
   111,411/231,356 = 231,356/x
3. Step 3: Cross multiply
   111,411x = 231,356 × 231,356
4. Step 4: Simplify right side
   111,411x = 53,525,598,736
5. Step 5: Solve for x
   x = 53,525,598,736/111,411
6. Step 6: Final answer
   x = 480,433.70