Finding the Fourth Proportional to 2,196.27, 3,288.74 and 1,221.03

Step by Step Solution

1. Step 1: Write the proportion equation
   2,196.27 : 3,288.74 = 1,221.03 : x
2. Step 2: Convert to fraction form
   2,196.27/3,288.74 = 1,221.03/x
3. Step 3: Cross multiply
   2,196.27x = 3,288.74 × 1,221.03
4. Step 4: Simplify right side
   2,196.27x = 4,015,644.10
5. Step 5: Solve for x
   x = 4,015,644.10/2,196.27
6. Step 6: Final answer
   x = 1,828.39