Finding the Third Proportional to 210,856 and 308,830

Step by Step Solution

1. Step 1: Write the proportion equation
   210,856 : 308,830 = 308,830 : x
2. Step 2: Convert to fraction form
   210,856/308,830 = 308,830/x
3. Step 3: Cross multiply
   210,856x = 308,830 × 308,830
4. Step 4: Simplify right side
   210,856x = 95,375,968,900
5. Step 5: Solve for x
   x = 95,375,968,900/210,856
6. Step 6: Final answer
   x = 452,327.51