Finding the Fourth Proportional to 5,168.56, 7,131.72 and 3,071.92

Step by Step Solution

1. Step 1: Write the proportion equation
   5,168.56 : 7,131.72 = 3,071.92 : x
2. Step 2: Convert to fraction form
   5,168.56/7,131.72 = 3,071.92/x
3. Step 3: Cross multiply
   5,168.56x = 7,131.72 × 3,071.92
4. Step 4: Simplify right side
   5,168.56x = 21,908,073.30
5. Step 5: Solve for x
   x = 21,908,073.30/5,168.56
6. Step 6: Final answer
   x = 4,238.72