Finding the Third Proportional to 18,978.75 and 20,801.25

Step by Step Solution

1. Step 1: Write the proportion equation
   18,978.75 : 20,801.25 = 20,801.25 : x
2. Step 2: Convert to fraction form
   18,978.75/20,801.25 = 20,801.25/x
3. Step 3: Cross multiply
   18,978.75x = 20,801.25 × 20,801.25
4. Step 4: Simplify right side
   18,978.75x = 432,692,001.56
5. Step 5: Solve for x
   x = 432,692,001.56/18,978.75
6. Step 6: Final answer
   x = 22,798.76