Finding the Fourth Proportional to 21,498.64, 29,671.02 and 12,067.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,498.64 : 29,671.02 = 12,067.72 : x
2. Step 2: Convert to fraction form
   21,498.64/29,671.02 = 12,067.72/x
3. Step 3: Cross multiply
   21,498.64x = 29,671.02 × 12,067.72
4. Step 4: Simplify right side
   21,498.64x = 358,061,561.47
5. Step 5: Solve for x
   x = 358,061,561.47/21,498.64
6. Step 6: Final answer
   x = 16,655.08