Finding the Fourth Proportional to 21,823.34, 30,114.77 and 12,870.41

Step by Step Solution

1. Step 1: Write the proportion equation
   21,823.34 : 30,114.77 = 12,870.41 : x
2. Step 2: Convert to fraction form
   21,823.34/30,114.77 = 12,870.41/x
3. Step 3: Cross multiply
   21,823.34x = 30,114.77 × 12,870.41
4. Step 4: Simplify right side
   21,823.34x = 387,589,222.03
5. Step 5: Solve for x
   x = 387,589,222.03/21,823.34
6. Step 6: Final answer
   x = 17,760.31