Finding the Third Proportional to 309,975.75 and 657,150

Step by Step Solution

1. Step 1: Write the proportion equation
   309,975.75 : 657,150 = 657,150 : x
2. Step 2: Convert to fraction form
   309,975.75/657,150 = 657,150/x
3. Step 3: Cross multiply
   309,975.75x = 657,150 × 657,150
4. Step 4: Simplify right side
   309,975.75x = 431,846,122,500
5. Step 5: Solve for x
   x = 431,846,122,500/309,975.75
6. Step 6: Final answer
   x = 1,393,160.99