Finding the Fourth Proportional to 3,709.80, 5,119.83 and 2,116.71

Step by Step Solution

1. Step 1: Write the proportion equation
   3,709.80 : 5,119.83 = 2,116.71 : x
2. Step 2: Convert to fraction form
   3,709.80/5,119.83 = 2,116.71/x
3. Step 3: Cross multiply
   3,709.80x = 5,119.83 × 2,116.71
4. Step 4: Simplify right side
   3,709.80x = 10,837,195.36
5. Step 5: Solve for x
   x = 10,837,195.36/3,709.80
6. Step 6: Final answer
   x = 2,921.23