Finding the Third Proportional to 19,978 and 28,777

Step by Step Solution

1. Step 1: Write the proportion equation
   19,978 : 28,777 = 28,777 : x
2. Step 2: Convert to fraction form
   19,978/28,777 = 28,777/x
3. Step 3: Cross multiply
   19,978x = 28,777 × 28,777
4. Step 4: Simplify right side
   19,978x = 828,115,729
5. Step 5: Solve for x
   x = 828,115,729/19,978
6. Step 6: Final answer
   x = 41,451.38