Finding the Fourth Proportional to 5,164.69, 7,127.24 and 2,806.78

Step by Step Solution

1. Step 1: Write the proportion equation
   5,164.69 : 7,127.24 = 2,806.78 : x
2. Step 2: Convert to fraction form
   5,164.69/7,127.24 = 2,806.78/x
3. Step 3: Cross multiply
   5,164.69x = 7,127.24 × 2,806.78
4. Step 4: Simplify right side
   5,164.69x = 20,004,594.69
5. Step 5: Solve for x
   x = 20,004,594.69/5,164.69
6. Step 6: Final answer
   x = 3,873.34