Finding the Fourth Proportional to 21,574.71, 29,766.15 and 12,141.45

Step by Step Solution

1. Step 1: Write the proportion equation
   21,574.71 : 29,766.15 = 12,141.45 : x
2. Step 2: Convert to fraction form
   21,574.71/29,766.15 = 12,141.45/x
3. Step 3: Cross multiply
   21,574.71x = 29,766.15 × 12,141.45
4. Step 4: Simplify right side
   21,574.71x = 361,404,221.92
5. Step 5: Solve for x
   x = 361,404,221.92/21,574.71
6. Step 6: Final answer
   x = 16,751.29