Finding the Third Proportional to 20,103.75 and 42,879.38

Step by Step Solution

1. Step 1: Write the proportion equation
   20,103.75 : 42,879.38 = 42,879.38 : x
2. Step 2: Convert to fraction form
   20,103.75/42,879.38 = 42,879.38/x
3. Step 3: Cross multiply
   20,103.75x = 42,879.38 × 42,879.38
4. Step 4: Simplify right side
   20,103.75x = 1,838,640,800.39
5. Step 5: Solve for x
   x = 1,838,640,800.39/20,103.75
6. Step 6: Final answer
   x = 91,457.60