Finding the Third Proportional to 20,426.25 and 28,128

Step by Step Solution

1. Step 1: Write the proportion equation
   20,426.25 : 28,128 = 28,128 : x
2. Step 2: Convert to fraction form
   20,426.25/28,128 = 28,128/x
3. Step 3: Cross multiply
   20,426.25x = 28,128 × 28,128
4. Step 4: Simplify right side
   20,426.25x = 791,184,384
5. Step 5: Solve for x
   x = 791,184,384/20,426.25
6. Step 6: Final answer
   x = 38,733.71