Finding the Fourth Proportional to 21,498.32, 29,668.20 and 12,067.76

Step by Step Solution

1. Step 1: Write the proportion equation
   21,498.32 : 29,668.20 = 12,067.76 : x
2. Step 2: Convert to fraction form
   21,498.32/29,668.20 = 12,067.76/x
3. Step 3: Cross multiply
   21,498.32x = 29,668.20 × 12,067.76
4. Step 4: Simplify right side
   21,498.32x = 358,028,717.23
5. Step 5: Solve for x
   x = 358,028,717.23/21,498.32
6. Step 6: Final answer
   x = 16,653.80