Finding the Fourth Proportional to 15,016.25, 20,720.72 and 8,300.18

Step by Step Solution

1. Step 1: Write the proportion equation
   15,016.25 : 20,720.72 = 8,300.18 : x
2. Step 2: Convert to fraction form
   15,016.25/20,720.72 = 8,300.18/x
3. Step 3: Cross multiply
   15,016.25x = 20,720.72 × 8,300.18
4. Step 4: Simplify right side
   15,016.25x = 171,985,622.88
5. Step 5: Solve for x
   x = 171,985,622.88/15,016.25
6. Step 6: Final answer
   x = 11,453.30