Finding the Third Proportional to 20,346 and 42,879

Step by Step Solution

1. Step 1: Write the proportion equation
   20,346 : 42,879 = 42,879 : x
2. Step 2: Convert to fraction form
   20,346/42,879 = 42,879/x
3. Step 3: Cross multiply
   20,346x = 42,879 × 42,879
4. Step 4: Simplify right side
   20,346x = 1,838,608,641
5. Step 5: Solve for x
   x = 1,838,608,641/20,346
6. Step 6: Final answer
   x = 90,367.08