Finding the Third Proportional to 331,351 and 518,349.50

Step by Step Solution

1. Step 1: Write the proportion equation
   331,351 : 518,349.50 = 518,349.50 : x
2. Step 2: Convert to fraction form
   331,351/518,349.50 = 518,349.50/x
3. Step 3: Cross multiply
   331,351x = 518,349.50 × 518,349.50
4. Step 4: Simplify right side
   331,351x = 268,686,204,150.25
5. Step 5: Solve for x
   x = 268,686,204,150.25/331,351
6. Step 6: Final answer
   x = 810,880.92