Finding the Fourth Proportional to 3,718.28, 5,131.32 and 2,039.76

Step by Step Solution

1. Step 1: Write the proportion equation
   3,718.28 : 5,131.32 = 2,039.76 : x
2. Step 2: Convert to fraction form
   3,718.28/5,131.32 = 2,039.76/x
3. Step 3: Cross multiply
   3,718.28x = 5,131.32 × 2,039.76
4. Step 4: Simplify right side
   3,718.28x = 10,466,661.28
5. Step 5: Solve for x
   x = 10,466,661.28/3,718.28
6. Step 6: Final answer
   x = 2,814.92