Finding the Third Proportional to 20,436.75 and 28,920.38

Step by Step Solution

1. Step 1: Write the proportion equation
   20,436.75 : 28,920.38 = 28,920.38 : x
2. Step 2: Convert to fraction form
   20,436.75/28,920.38 = 28,920.38/x
3. Step 3: Cross multiply
   20,436.75x = 28,920.38 × 28,920.38
4. Step 4: Simplify right side
   20,436.75x = 836,388,090.14
5. Step 5: Solve for x
   x = 836,388,090.14/20,436.75
6. Step 6: Final answer
   x = 40,925.69