Finding the Fourth Proportional to 21,658.72, 29,886.32 and 12,096.32

Step by Step Solution

1. Step 1: Write the proportion equation
   21,658.72 : 29,886.32 = 12,096.32 : x
2. Step 2: Convert to fraction form
   21,658.72/29,886.32 = 12,096.32/x
3. Step 3: Cross multiply
   21,658.72x = 29,886.32 × 12,096.32
4. Step 4: Simplify right side
   21,658.72x = 361,514,490.34
5. Step 5: Solve for x
   x = 361,514,490.34/21,658.72
6. Step 6: Final answer
   x = 16,691.41