Finding the Third Proportional to 8,216.31 and 17,987.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,216.31 : 17,987.50 = 17,987.50 : x
2. Step 2: Convert to fraction form
   8,216.31/17,987.50 = 17,987.50/x
3. Step 3: Cross multiply
   8,216.31x = 17,987.50 × 17,987.50
4. Step 4: Simplify right side
   8,216.31x = 323,550,156.25
5. Step 5: Solve for x
   x = 323,550,156.25/8,216.31
6. Step 6: Final answer
   x = 39,379.00