Finding the Fourth Proportional to 21,518.82, 29,695.98 and 12,087.38

Step by Step Solution

1. Step 1: Write the proportion equation
   21,518.82 : 29,695.98 = 12,087.38 : x
2. Step 2: Convert to fraction form
   21,518.82/29,695.98 = 12,087.38/x
3. Step 3: Cross multiply
   21,518.82x = 29,695.98 × 12,087.38
4. Step 4: Simplify right side
   21,518.82x = 358,946,594.73
5. Step 5: Solve for x
   x = 358,946,594.73/21,518.82
6. Step 6: Final answer
   x = 16,680.59