Finding the Fourth Proportional to 14,097.69, 21,105.42 and 12,217.89

Step by Step Solution

1. Step 1: Write the proportion equation
   14,097.69 : 21,105.42 = 12,217.89 : x
2. Step 2: Convert to fraction form
   14,097.69/21,105.42 = 12,217.89/x
3. Step 3: Cross multiply
   14,097.69x = 21,105.42 × 12,217.89
4. Step 4: Simplify right side
   14,097.69x = 257,863,699.96
5. Step 5: Solve for x
   x = 257,863,699.96/14,097.69
6. Step 6: Final answer
   x = 18,291.20