Finding the Third Proportional to 311,433 and 679,144.50

Step by Step Solution

1. Step 1: Write the proportion equation
   311,433 : 679,144.50 = 679,144.50 : x
2. Step 2: Convert to fraction form
   311,433/679,144.50 = 679,144.50/x
3. Step 3: Cross multiply
   311,433x = 679,144.50 × 679,144.50
4. Step 4: Simplify right side
   311,433x = 461,237,251,880.25
5. Step 5: Solve for x
   x = 461,237,251,880.25/311,433
6. Step 6: Final answer
   x = 1,481,015.99