Finding the Fourth Proportional to 2,196.13, 3,291.36 and 1,643.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,196.13 : 3,291.36 = 1,643.98 : x
2. Step 2: Convert to fraction form
   2,196.13/3,291.36 = 1,643.98/x
3. Step 3: Cross multiply
   2,196.13x = 3,291.36 × 1,643.98
4. Step 4: Simplify right side
   2,196.13x = 5,410,930.01
5. Step 5: Solve for x
   x = 5,410,930.01/2,196.13
6. Step 6: Final answer
   x = 2,463.85