Finding the Third Proportional to 20,936.56 and 28,430.31

Step by Step Solution

1. Step 1: Write the proportion equation
   20,936.56 : 28,430.31 = 28,430.31 : x
2. Step 2: Convert to fraction form
   20,936.56/28,430.31 = 28,430.31/x
3. Step 3: Cross multiply
   20,936.56x = 28,430.31 × 28,430.31
4. Step 4: Simplify right side
   20,936.56x = 808,282,668.85
5. Step 5: Solve for x
   x = 808,282,668.85/20,936.56
6. Step 6: Final answer
   x = 38,606.27