Finding the Fourth Proportional to 16,818.72, 23,210.37 and 9,265.20

Step by Step Solution

1. Step 1: Write the proportion equation
   16,818.72 : 23,210.37 = 9,265.20 : x
2. Step 2: Convert to fraction form
   16,818.72/23,210.37 = 9,265.20/x
3. Step 3: Cross multiply
   16,818.72x = 23,210.37 × 9,265.20
4. Step 4: Simplify right side
   16,818.72x = 215,048,720.12
5. Step 5: Solve for x
   x = 215,048,720.12/16,818.72
6. Step 6: Final answer
   x = 12,786.27