Finding the Third Proportional to 90,138 and 191,922

Step by Step Solution

1. Step 1: Write the proportion equation
   90,138 : 191,922 = 191,922 : x
2. Step 2: Convert to fraction form
   90,138/191,922 = 191,922/x
3. Step 3: Cross multiply
   90,138x = 191,922 × 191,922
4. Step 4: Simplify right side
   90,138x = 36,834,054,084
5. Step 5: Solve for x
   x = 36,834,054,084/90,138
6. Step 6: Final answer
   x = 408,640.69