Finding the Third Proportional to 213,669 and 309,479.50

Step by Step Solution

1. Step 1: Write the proportion equation
   213,669 : 309,479.50 = 309,479.50 : x
2. Step 2: Convert to fraction form
   213,669/309,479.50 = 309,479.50/x
3. Step 3: Cross multiply
   213,669x = 309,479.50 × 309,479.50
4. Step 4: Simplify right side
   213,669x = 95,777,560,920.25
5. Step 5: Solve for x
   x = 95,777,560,920.25/213,669
6. Step 6: Final answer
   x = 448,252.02