Finding the Fourth Proportional to 21,491.82, 29,658.71 and 12,060.38

Step by Step Solution

1. Step 1: Write the proportion equation
   21,491.82 : 29,658.71 = 12,060.38 : x
2. Step 2: Convert to fraction form
   21,491.82/29,658.71 = 12,060.38/x
3. Step 3: Cross multiply
   21,491.82x = 29,658.71 × 12,060.38
4. Step 4: Simplify right side
   21,491.82x = 357,695,104.31
5. Step 5: Solve for x
   x = 357,695,104.31/21,491.82
6. Step 6: Final answer
   x = 16,643.31