Finding the Third Proportional to 5,536.69 and 10,815.19

Step by Step Solution

1. Step 1: Write the proportion equation
   5,536.69 : 10,815.19 = 10,815.19 : x
2. Step 2: Convert to fraction form
   5,536.69/10,815.19 = 10,815.19/x
3. Step 3: Cross multiply
   5,536.69x = 10,815.19 × 10,815.19
4. Step 4: Simplify right side
   5,536.69x = 116,968,280.66
5. Step 5: Solve for x
   x = 116,968,280.66/5,536.69
6. Step 6: Final answer
   x = 21,126.04