Finding the Third Proportional to 300,757.50 and 646,713

Step by Step Solution

1. Step 1: Write the proportion equation
   300,757.50 : 646,713 = 646,713 : x
2. Step 2: Convert to fraction form
   300,757.50/646,713 = 646,713/x
3. Step 3: Cross multiply
   300,757.50x = 646,713 × 646,713
4. Step 4: Simplify right side
   300,757.50x = 418,237,704,369
5. Step 5: Solve for x
   x = 418,237,704,369/300,757.50
6. Step 6: Final answer
   x = 1,390,614.38