Finding the Third Proportional to 20,553 and 42,077

Step by Step Solution

1. Step 1: Write the proportion equation
   20,553 : 42,077 = 42,077 : x
2. Step 2: Convert to fraction form
   20,553/42,077 = 42,077/x
3. Step 3: Cross multiply
   20,553x = 42,077 × 42,077
4. Step 4: Simplify right side
   20,553x = 1,770,473,929
5. Step 5: Solve for x
   x = 1,770,473,929/20,553
6. Step 6: Final answer
   x = 86,141.87