Finding the Third Proportional to 20,589.19 and 28,405.69

Step by Step Solution

1. Step 1: Write the proportion equation
   20,589.19 : 28,405.69 = 28,405.69 : x
2. Step 2: Convert to fraction form
   20,589.19/28,405.69 = 28,405.69/x
3. Step 3: Cross multiply
   20,589.19x = 28,405.69 × 28,405.69
4. Step 4: Simplify right side
   20,589.19x = 806,883,082.35
5. Step 5: Solve for x
   x = 806,883,082.35/20,589.19
6. Step 6: Final answer
   x = 39,189.65