Finding the Third Proportional to 90,128 and 191,902

Step by Step Solution

1. Step 1: Write the proportion equation
   90,128 : 191,902 = 191,902 : x
2. Step 2: Convert to fraction form
   90,128/191,902 = 191,902/x
3. Step 3: Cross multiply
   90,128x = 191,902 × 191,902
4. Step 4: Simplify right side
   90,128x = 36,826,377,604
5. Step 5: Solve for x
   x = 36,826,377,604/90,128
6. Step 6: Final answer
   x = 408,600.85