Finding the Third Proportional to 131,878 and 209,670

Step by Step Solution

1. Step 1: Write the proportion equation
   131,878 : 209,670 = 209,670 : x
2. Step 2: Convert to fraction form
   131,878/209,670 = 209,670/x
3. Step 3: Cross multiply
   131,878x = 209,670 × 209,670
4. Step 4: Simplify right side
   131,878x = 43,961,508,900
5. Step 5: Solve for x
   x = 43,961,508,900/131,878
6. Step 6: Final answer
   x = 333,349.83