Finding the Fourth Proportional to 2,196.72, 3,282.48 and 2,155.68

Step by Step Solution

1. Step 1: Write the proportion equation
   2,196.72 : 3,282.48 = 2,155.68 : x
2. Step 2: Convert to fraction form
   2,196.72/3,282.48 = 2,155.68/x
3. Step 3: Cross multiply
   2,196.72x = 3,282.48 × 2,155.68
4. Step 4: Simplify right side
   2,196.72x = 7,075,976.49
5. Step 5: Solve for x
   x = 7,075,976.49/2,196.72
6. Step 6: Final answer
   x = 3,221.16