Finding the Fourth Proportional to 2,196.76, 3,291.42 and 1,329.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,196.76 : 3,291.42 = 1,329.25 : x
2. Step 2: Convert to fraction form
   2,196.76/3,291.42 = 1,329.25/x
3. Step 3: Cross multiply
   2,196.76x = 3,291.42 × 1,329.25
4. Step 4: Simplify right side
   2,196.76x = 4,375,120.04
5. Step 5: Solve for x
   x = 4,375,120.04/2,196.76
6. Step 6: Final answer
   x = 1,991.62