Finding the Fourth Proportional to 23,067.99, 31,821.39 and 15,424.43

Step by Step Solution

1. Step 1: Write the proportion equation
   23,067.99 : 31,821.39 = 15,424.43 : x
2. Step 2: Convert to fraction form
   23,067.99/31,821.39 = 15,424.43/x
3. Step 3: Cross multiply
   23,067.99x = 31,821.39 × 15,424.43
4. Step 4: Simplify right side
   23,067.99x = 490,826,643.45
5. Step 5: Solve for x
   x = 490,826,643.45/23,067.99
6. Step 6: Final answer
   x = 21,277.39