Finding the Third Proportional to 3,987.25 and 8,730.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,987.25 : 8,730.50 = 8,730.50 : x
2. Step 2: Convert to fraction form
   3,987.25/8,730.50 = 8,730.50/x
3. Step 3: Cross multiply
   3,987.25x = 8,730.50 × 8,730.50
4. Step 4: Simplify right side
   3,987.25x = 76,221,630.25
5. Step 5: Solve for x
   x = 76,221,630.25/3,987.25
6. Step 6: Final answer
   x = 19,116.34