Finding the Fourth Proportional to 3,811.69, 5,716.25 and 1,278.27

Step by Step Solution

1. Step 1: Write the proportion equation
   3,811.69 : 5,716.25 = 1,278.27 : x
2. Step 2: Convert to fraction form
   3,811.69/5,716.25 = 1,278.27/x
3. Step 3: Cross multiply
   3,811.69x = 5,716.25 × 1,278.27
4. Step 4: Simplify right side
   3,811.69x = 7,306,928.37
5. Step 5: Solve for x
   x = 7,306,928.37/3,811.69
6. Step 6: Final answer
   x = 1,916.98