Finding the Fourth Proportional to 11,538.72, 17,311.32 and 4,143.15

Step by Step Solution

1. Step 1: Write the proportion equation
   11,538.72 : 17,311.32 = 4,143.15 : x
2. Step 2: Convert to fraction form
   11,538.72/17,311.32 = 4,143.15/x
3. Step 3: Cross multiply
   11,538.72x = 17,311.32 × 4,143.15
4. Step 4: Simplify right side
   11,538.72x = 71,723,395.46
5. Step 5: Solve for x
   x = 71,723,395.46/11,538.72
6. Step 6: Final answer
   x = 6,215.89