Finding the Fourth Proportional to 3,139.09, 4,709.41 and 2,216.45

Step by Step Solution

1. Step 1: Write the proportion equation
   3,139.09 : 4,709.41 = 2,216.45 : x
2. Step 2: Convert to fraction form
   3,139.09/4,709.41 = 2,216.45/x
3. Step 3: Cross multiply
   3,139.09x = 4,709.41 × 2,216.45
4. Step 4: Simplify right side
   3,139.09x = 10,438,178.03
5. Step 5: Solve for x
   x = 10,438,178.03/3,139.09
6. Step 6: Final answer
   x = 3,325.23