Finding the Third Proportional to 89,309 and 190,900

Step by Step Solution

1. Step 1: Write the proportion equation
   89,309 : 190,900 = 190,900 : x
2. Step 2: Convert to fraction form
   89,309/190,900 = 190,900/x
3. Step 3: Cross multiply
   89,309x = 190,900 × 190,900
4. Step 4: Simplify right side
   89,309x = 36,442,810,000
5. Step 5: Solve for x
   x = 36,442,810,000/89,309
6. Step 6: Final answer
   x = 408,053.05