Finding the Third Proportional to 19,879 and 42,448

Step by Step Solution

1. Step 1: Write the proportion equation
   19,879 : 42,448 = 42,448 : x
2. Step 2: Convert to fraction form
   19,879/42,448 = 42,448/x
3. Step 3: Cross multiply
   19,879x = 42,448 × 42,448
4. Step 4: Simplify right side
   19,879x = 1,801,832,704
5. Step 5: Solve for x
   x = 1,801,832,704/19,879
6. Step 6: Final answer
   x = 90,640.01