Finding the Fourth Proportional to 3,709.12, 5,118.46 and 2,216.69

Step by Step Solution

1. Step 1: Write the proportion equation
   3,709.12 : 5,118.46 = 2,216.69 : x
2. Step 2: Convert to fraction form
   3,709.12/5,118.46 = 2,216.69/x
3. Step 3: Cross multiply
   3,709.12x = 5,118.46 × 2,216.69
4. Step 4: Simplify right side
   3,709.12x = 11,346,039.10
5. Step 5: Solve for x
   x = 11,346,039.10/3,709.12
6. Step 6: Final answer
   x = 3,058.96