Finding the Third Proportional to 19,980 and 28,780

Step by Step Solution

1. Step 1: Write the proportion equation
   19,980 : 28,780 = 28,780 : x
2. Step 2: Convert to fraction form
   19,980/28,780 = 28,780/x
3. Step 3: Cross multiply
   19,980x = 28,780 × 28,780
4. Step 4: Simplify right side
   19,980x = 828,288,400
5. Step 5: Solve for x
   x = 828,288,400/19,980
6. Step 6: Final answer
   x = 41,455.88