Finding the Fourth Proportional to 5,672.08, 7,831.28 and 5,072.71

Step by Step Solution

1. Step 1: Write the proportion equation
   5,672.08 : 7,831.28 = 5,072.71 : x
2. Step 2: Convert to fraction form
   5,672.08/7,831.28 = 5,072.71/x
3. Step 3: Cross multiply
   5,672.08x = 7,831.28 × 5,072.71
4. Step 4: Simplify right side
   5,672.08x = 39,725,812.37
5. Step 5: Solve for x
   x = 39,725,812.37/5,672.08
6. Step 6: Final answer
   x = 7,003.75