Finding the Third Proportional to 87,123 and 188,998

Step by Step Solution

1. Step 1: Write the proportion equation
   87,123 : 188,998 = 188,998 : x
2. Step 2: Convert to fraction form
   87,123/188,998 = 188,998/x
3. Step 3: Cross multiply
   87,123x = 188,998 × 188,998
4. Step 4: Simplify right side
   87,123x = 35,720,244,004
5. Step 5: Solve for x
   x = 35,720,244,004/87,123
6. Step 6: Final answer
   x = 409,997.87