Finding the Fourth Proportional to 2,196.09, 3,287.12 and 1,219.77

Step by Step Solution

1. Step 1: Write the proportion equation
   2,196.09 : 3,287.12 = 1,219.77 : x
2. Step 2: Convert to fraction form
   2,196.09/3,287.12 = 1,219.77/x
3. Step 3: Cross multiply
   2,196.09x = 3,287.12 × 1,219.77
4. Step 4: Simplify right side
   2,196.09x = 4,009,524.26
5. Step 5: Solve for x
   x = 4,009,524.26/2,196.09
6. Step 6: Final answer
   x = 1,825.76