Finding the Third Proportional to 8,854.31 and 13,258.69

Step by Step Solution

1. Step 1: Write the proportion equation
   8,854.31 : 13,258.69 = 13,258.69 : x
2. Step 2: Convert to fraction form
   8,854.31/13,258.69 = 13,258.69/x
3. Step 3: Cross multiply
   8,854.31x = 13,258.69 × 13,258.69
4. Step 4: Simplify right side
   8,854.31x = 175,792,794.22
5. Step 5: Solve for x
   x = 175,792,794.22/8,854.31
6. Step 6: Final answer
   x = 19,853.92