Finding the Third Proportional to 15,886.13 and 20,791.69

Step by Step Solution

1. Step 1: Write the proportion equation
   15,886.13 : 20,791.69 = 20,791.69 : x
2. Step 2: Convert to fraction form
   15,886.13/20,791.69 = 20,791.69/x
3. Step 3: Cross multiply
   15,886.13x = 20,791.69 × 20,791.69
4. Step 4: Simplify right side
   15,886.13x = 432,294,269.10
5. Step 5: Solve for x
   x = 432,294,269.10/15,886.13
6. Step 6: Final answer
   x = 27,212.07