Finding the Fourth Proportional to 21,836.28, 30,136.59 and 12,146.71

Step by Step Solution

1. Step 1: Write the proportion equation
   21,836.28 : 30,136.59 = 12,146.71 : x
2. Step 2: Convert to fraction form
   21,836.28/30,136.59 = 12,146.71/x
3. Step 3: Cross multiply
   21,836.28x = 30,136.59 × 12,146.71
4. Step 4: Simplify right side
   21,836.28x = 366,060,400.28
5. Step 5: Solve for x
   x = 366,060,400.28/21,836.28
6. Step 6: Final answer
   x = 16,763.86