Finding the Third Proportional to 15,129.75 and 19,910.25

Step by Step Solution

1. Step 1: Write the proportion equation
   15,129.75 : 19,910.25 = 19,910.25 : x
2. Step 2: Convert to fraction form
   15,129.75/19,910.25 = 19,910.25/x
3. Step 3: Cross multiply
   15,129.75x = 19,910.25 × 19,910.25
4. Step 4: Simplify right side
   15,129.75x = 396,418,055.06
5. Step 5: Solve for x
   x = 396,418,055.06/15,129.75
6. Step 6: Final answer
   x = 26,201.23