Finding the Fourth Proportional to 2,196.72, 3,291.84 and 1,222.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,196.72 : 3,291.84 = 1,222.56 : x
2. Step 2: Convert to fraction form
   2,196.72/3,291.84 = 1,222.56/x
3. Step 3: Cross multiply
   2,196.72x = 3,291.84 × 1,222.56
4. Step 4: Simplify right side
   2,196.72x = 4,024,471.91
5. Step 5: Solve for x
   x = 4,024,471.91/2,196.72
6. Step 6: Final answer
   x = 1,832.04