Finding the Fourth Proportional to 5,164.57, 7,127.15 and 2,806.71

Step by Step Solution

1. Step 1: Write the proportion equation
   5,164.57 : 7,127.15 = 2,806.71 : x
2. Step 2: Convert to fraction form
   5,164.57/7,127.15 = 2,806.71/x
3. Step 3: Cross multiply
   5,164.57x = 7,127.15 × 2,806.71
4. Step 4: Simplify right side
   5,164.57x = 20,003,850.19
5. Step 5: Solve for x
   x = 20,003,850.19/5,164.57
6. Step 6: Final answer
   x = 3,873.28