Finding the Third Proportional to 19,003.50 and 21,879

Step by Step Solution

1. Step 1: Write the proportion equation
   19,003.50 : 21,879 = 21,879 : x
2. Step 2: Convert to fraction form
   19,003.50/21,879 = 21,879/x
3. Step 3: Cross multiply
   19,003.50x = 21,879 × 21,879
4. Step 4: Simplify right side
   19,003.50x = 478,690,641
5. Step 5: Solve for x
   x = 478,690,641/19,003.50
6. Step 6: Final answer
   x = 25,189.60