Finding the Third Proportional to 15,528.94 and 20,689.59

Step by Step Solution

1. Step 1: Write the proportion equation
   15,528.94 : 20,689.59 = 20,689.59 : x
2. Step 2: Convert to fraction form
   15,528.94/20,689.59 = 20,689.59/x
3. Step 3: Cross multiply
   15,528.94x = 20,689.59 × 20,689.59
4. Step 4: Simplify right side
   15,528.94x = 428,059,289.54
5. Step 5: Solve for x
   x = 428,059,289.54/15,528.94
6. Step 6: Final answer
   x = 27,565.27