Finding the Third Proportional to 10,828.69 and 13,137.19

Step by Step Solution

1. Step 1: Write the proportion equation
   10,828.69 : 13,137.19 = 13,137.19 : x
2. Step 2: Convert to fraction form
   10,828.69/13,137.19 = 13,137.19/x
3. Step 3: Cross multiply
   10,828.69x = 13,137.19 × 13,137.19
4. Step 4: Simplify right side
   10,828.69x = 172,585,695.41
5. Step 5: Solve for x
   x = 172,585,695.41/10,828.69
6. Step 6: Final answer
   x = 15,937.82