Finding the Fourth Proportional to 3,709.89, 5,119.65 and 2,116.49

Step by Step Solution

1. Step 1: Write the proportion equation
   3,709.89 : 5,119.65 = 2,116.49 : x
2. Step 2: Convert to fraction form
   3,709.89/5,119.65 = 2,116.49/x
3. Step 3: Cross multiply
   3,709.89x = 5,119.65 × 2,116.49
4. Step 4: Simplify right side
   3,709.89x = 10,835,662.43
5. Step 5: Solve for x
   x = 10,835,662.43/3,709.89
6. Step 6: Final answer
   x = 2,920.75