Finding the Fourth Proportional to 19,399.44, 29,080.71 and 12,359.69

Step by Step Solution

1. Step 1: Write the proportion equation
   19,399.44 : 29,080.71 = 12,359.69 : x
2. Step 2: Convert to fraction form
   19,399.44/29,080.71 = 12,359.69/x
3. Step 3: Cross multiply
   19,399.44x = 29,080.71 × 12,359.69
4. Step 4: Simplify right side
   19,399.44x = 359,428,633.28
5. Step 5: Solve for x
   x = 359,428,633.28/19,399.44
6. Step 6: Final answer
   x = 18,527.78