Finding the Third Proportional to 8,216.25 and 17,987.31

Step by Step Solution

1. Step 1: Write the proportion equation
   8,216.25 : 17,987.31 = 17,987.31 : x
2. Step 2: Convert to fraction form
   8,216.25/17,987.31 = 17,987.31/x
3. Step 3: Cross multiply
   8,216.25x = 17,987.31 × 17,987.31
4. Step 4: Simplify right side
   8,216.25x = 323,543,410.97
5. Step 5: Solve for x
   x = 323,543,410.97/8,216.25
6. Step 6: Final answer
   x = 39,378.48