Finding the Fourth Proportional to 19,919.72, 27,477.82 and 12,454.76

Step by Step Solution

1. Step 1: Write the proportion equation
   19,919.72 : 27,477.82 = 12,454.76 : x
2. Step 2: Convert to fraction form
   19,919.72/27,477.82 = 12,454.76/x
3. Step 3: Cross multiply
   19,919.72x = 27,477.82 × 12,454.76
4. Step 4: Simplify right side
   19,919.72x = 342,229,653.42
5. Step 5: Solve for x
   x = 342,229,653.42/19,919.72
6. Step 6: Final answer
   x = 17,180.44