Finding the Third Proportional to 213,144 and 307,930.50

Step by Step Solution

1. Step 1: Write the proportion equation
   213,144 : 307,930.50 = 307,930.50 : x
2. Step 2: Convert to fraction form
   213,144/307,930.50 = 307,930.50/x
3. Step 3: Cross multiply
   213,144x = 307,930.50 × 307,930.50
4. Step 4: Simplify right side
   213,144x = 94,821,192,830.25
5. Step 5: Solve for x
   x = 94,821,192,830.25/213,144
6. Step 6: Final answer
   x = 444,869.16