Finding the Fourth Proportional to 12,819.07, 17,688.81 and 7,440.27

Step by Step Solution

1. Step 1: Write the proportion equation
   12,819.07 : 17,688.81 = 7,440.27 : x
2. Step 2: Convert to fraction form
   12,819.07/17,688.81 = 7,440.27/x
3. Step 3: Cross multiply
   12,819.07x = 17,688.81 × 7,440.27
4. Step 4: Simplify right side
   12,819.07x = 131,609,433.93
5. Step 5: Solve for x
   x = 131,609,433.93/12,819.07
6. Step 6: Final answer
   x = 10,266.69