Finding the Third Proportional to 140,296.50 and 300,519

Step by Step Solution

1. Step 1: Write the proportion equation
   140,296.50 : 300,519 = 300,519 : x
2. Step 2: Convert to fraction form
   140,296.50/300,519 = 300,519/x
3. Step 3: Cross multiply
   140,296.50x = 300,519 × 300,519
4. Step 4: Simplify right side
   140,296.50x = 90,311,669,361
5. Step 5: Solve for x
   x = 90,311,669,361/140,296.50
6. Step 6: Final answer
   x = 643,720.05