Finding the Fourth Proportional to 2,216.69, 3,314.91 and 1,661.84

Step by Step Solution

1. Step 1: Write the proportion equation
   2,216.69 : 3,314.91 = 1,661.84 : x
2. Step 2: Convert to fraction form
   2,216.69/3,314.91 = 1,661.84/x
3. Step 3: Cross multiply
   2,216.69x = 3,314.91 × 1,661.84
4. Step 4: Simplify right side
   2,216.69x = 5,508,850.03
5. Step 5: Solve for x
   x = 5,508,850.03/2,216.69
6. Step 6: Final answer
   x = 2,485.17