Finding the Third Proportional to 311,463 and 445,390.50

Step by Step Solution

1. Step 1: Write the proportion equation
   311,463 : 445,390.50 = 445,390.50 : x
2. Step 2: Convert to fraction form
   311,463/445,390.50 = 445,390.50/x
3. Step 3: Cross multiply
   311,463x = 445,390.50 × 445,390.50
4. Step 4: Simplify right side
   311,463x = 198,372,697,490.25
5. Step 5: Solve for x
   x = 198,372,697,490.25/311,463
6. Step 6: Final answer
   x = 636,906.14