Finding the Third Proportional to 18,991.88 and 39,198.75

Step by Step Solution

1. Step 1: Write the proportion equation
   18,991.88 : 39,198.75 = 39,198.75 : x
2. Step 2: Convert to fraction form
   18,991.88/39,198.75 = 39,198.75/x
3. Step 3: Cross multiply
   18,991.88x = 39,198.75 × 39,198.75
4. Step 4: Simplify right side
   18,991.88x = 1,536,542,001.56
5. Step 5: Solve for x
   x = 1,536,542,001.56/18,991.88
6. Step 6: Final answer
   x = 80,905.23