Finding the Third Proportional to 72,228 and 111,618

Step by Step Solution

1. Step 1: Write the proportion equation
   72,228 : 111,618 = 111,618 : x
2. Step 2: Convert to fraction form
   72,228/111,618 = 111,618/x
3. Step 3: Cross multiply
   72,228x = 111,618 × 111,618
4. Step 4: Simplify right side
   72,228x = 12,458,577,924
5. Step 5: Solve for x
   x = 12,458,577,924/72,228
6. Step 6: Final answer
   x = 172,489.59