Finding the Third Proportional to 13,258.69 and 18,259.17

Step by Step Solution

1. Step 1: Write the proportion equation
   13,258.69 : 18,259.17 = 18,259.17 : x
2. Step 2: Convert to fraction form
   13,258.69/18,259.17 = 18,259.17/x
3. Step 3: Cross multiply
   13,258.69x = 18,259.17 × 18,259.17
4. Step 4: Simplify right side
   13,258.69x = 333,397,357.56
5. Step 5: Solve for x
   x = 333,397,357.56/13,258.69
6. Step 6: Final answer
   x = 25,145.58