Finding the Fourth Proportional to 2,208.86, 3,314.42 and 1,221.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,208.86 : 3,314.42 = 1,221.49 : x
2. Step 2: Convert to fraction form
   2,208.86/3,314.42 = 1,221.49/x
3. Step 3: Cross multiply
   2,208.86x = 3,314.42 × 1,221.49
4. Step 4: Simplify right side
   2,208.86x = 4,048,546.59
5. Step 5: Solve for x
   x = 4,048,546.59/2,208.86
6. Step 6: Final answer
   x = 1,832.87