Finding the Third Proportional to 191,238 and 280,089

Step by Step Solution

1. Step 1: Write the proportion equation
   191,238 : 280,089 = 280,089 : x
2. Step 2: Convert to fraction form
   191,238/280,089 = 280,089/x
3. Step 3: Cross multiply
   191,238x = 280,089 × 280,089
4. Step 4: Simplify right side
   191,238x = 78,449,847,921
5. Step 5: Solve for x
   x = 78,449,847,921/191,238
6. Step 6: Final answer
   x = 410,221.02