Finding the Fourth Proportional to 16,818.69, 23,212.53 and 9,749.21

Step by Step Solution

1. Step 1: Write the proportion equation
   16,818.69 : 23,212.53 = 9,749.21 : x
2. Step 2: Convert to fraction form
   16,818.69/23,212.53 = 9,749.21/x
3. Step 3: Cross multiply
   16,818.69x = 23,212.53 × 9,749.21
4. Step 4: Simplify right side
   16,818.69x = 226,303,780.86
5. Step 5: Solve for x
   x = 226,303,780.86/16,818.69
6. Step 6: Final answer
   x = 13,455.49