Finding the Third Proportional to 20,426.34 and 28,128.09

Step by Step Solution

1. Step 1: Write the proportion equation
   20,426.34 : 28,128.09 = 28,128.09 : x
2. Step 2: Convert to fraction form
   20,426.34/28,128.09 = 28,128.09/x
3. Step 3: Cross multiply
   20,426.34x = 28,128.09 × 28,128.09
4. Step 4: Simplify right side
   20,426.34x = 791,189,658.01
5. Step 5: Solve for x
   x = 791,189,658.01/20,426.34
6. Step 6: Final answer
   x = 38,733.79