Finding the Third Proportional to 111,405 and 231,987

Step by Step Solution

1. Step 1: Write the proportion equation
   111,405 : 231,987 = 231,987 : x
2. Step 2: Convert to fraction form
   111,405/231,987 = 231,987/x
3. Step 3: Cross multiply
   111,405x = 231,987 × 231,987
4. Step 4: Simplify right side
   111,405x = 53,817,968,169
5. Step 5: Solve for x
   x = 53,817,968,169/111,405
6. Step 6: Final answer
   x = 483,083.96