Finding the Third Proportional to 111,488 and 238,240

Step by Step Solution

1. Step 1: Write the proportion equation
   111,488 : 238,240 = 238,240 : x
2. Step 2: Convert to fraction form
   111,488/238,240 = 238,240/x
3. Step 3: Cross multiply
   111,488x = 238,240 × 238,240
4. Step 4: Simplify right side
   111,488x = 56,758,297,600
5. Step 5: Solve for x
   x = 56,758,297,600/111,488
6. Step 6: Final answer
   x = 509,097.82