Finding the Fourth Proportional to 2,527.76, 3,786.76 and 1,428.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,527.76 : 3,786.76 = 1,428.76 : x
2. Step 2: Convert to fraction form
   2,527.76/3,786.76 = 1,428.76/x
3. Step 3: Cross multiply
   2,527.76x = 3,786.76 × 1,428.76
4. Step 4: Simplify right side
   2,527.76x = 5,410,371.22
5. Step 5: Solve for x
   x = 5,410,371.22/2,527.76
6. Step 6: Final answer
   x = 2,140.38