Finding the Fourth Proportional to 2,196.04, 3,028.80 and 1,311.66

Step by Step Solution

1. Step 1: Write the proportion equation
   2,196.04 : 3,028.80 = 1,311.66 : x
2. Step 2: Convert to fraction form
   2,196.04/3,028.80 = 1,311.66/x
3. Step 3: Cross multiply
   2,196.04x = 3,028.80 × 1,311.66
4. Step 4: Simplify right side
   2,196.04x = 3,972,755.81
5. Step 5: Solve for x
   x = 3,972,755.81/2,196.04
6. Step 6: Final answer
   x = 1,809.05