Finding the Third Proportional to 206,425.69 and 315,793.69

Step by Step Solution

1. Step 1: Write the proportion equation
   206,425.69 : 315,793.69 = 315,793.69 : x
2. Step 2: Convert to fraction form
   206,425.69/315,793.69 = 315,793.69/x
3. Step 3: Cross multiply
   206,425.69x = 315,793.69 × 315,793.69
4. Step 4: Simplify right side
   206,425.69x = 99,725,653,064.85
5. Step 5: Solve for x
   x = 99,725,653,064.85/206,425.69
6. Step 6: Final answer
   x = 483,106.80