Finding the Fourth Proportional to 15,851.03, 21,880.61 and 9,142.41

Step by Step Solution

1. Step 1: Write the proportion equation
   15,851.03 : 21,880.61 = 9,142.41 : x
2. Step 2: Convert to fraction form
   15,851.03/21,880.61 = 9,142.41/x
3. Step 3: Cross multiply
   15,851.03x = 21,880.61 × 9,142.41
4. Step 4: Simplify right side
   15,851.03x = 200,041,461.96
5. Step 5: Solve for x
   x = 200,041,461.96/15,851.03
6. Step 6: Final answer
   x = 12,620.09