Finding the Fourth Proportional to 10,638.72, 15,959.81 and 3,143.04

Step by Step Solution

1. Step 1: Write the proportion equation
   10,638.72 : 15,959.81 = 3,143.04 : x
2. Step 2: Convert to fraction form
   10,638.72/15,959.81 = 3,143.04/x
3. Step 3: Cross multiply
   10,638.72x = 15,959.81 × 3,143.04
4. Step 4: Simplify right side
   10,638.72x = 50,162,321.22
5. Step 5: Solve for x
   x = 50,162,321.22/10,638.72
6. Step 6: Final answer
   x = 4,715.07