Finding the Fourth Proportional to 22,399.68, 30,912.42 and 13,451.19

Step by Step Solution

1. Step 1: Write the proportion equation
   22,399.68 : 30,912.42 = 13,451.19 : x
2. Step 2: Convert to fraction form
   22,399.68/30,912.42 = 13,451.19/x
3. Step 3: Cross multiply
   22,399.68x = 30,912.42 × 13,451.19
4. Step 4: Simplify right side
   22,399.68x = 415,808,834.78
5. Step 5: Solve for x
   x = 415,808,834.78/22,399.68
6. Step 6: Final answer
   x = 18,563.16