Finding the Third Proportional to 140,892 and 210,618

Step by Step Solution

1. Step 1: Write the proportion equation
   140,892 : 210,618 = 210,618 : x
2. Step 2: Convert to fraction form
   140,892/210,618 = 210,618/x
3. Step 3: Cross multiply
   140,892x = 210,618 × 210,618
4. Step 4: Simplify right side
   140,892x = 44,359,941,924
5. Step 5: Solve for x
   x = 44,359,941,924/140,892
6. Step 6: Final answer
   x = 314,850.68