Finding the Fourth Proportional to 2,185.16, 3,015.42 and 1,190.36

Step by Step Solution

1. Step 1: Write the proportion equation
   2,185.16 : 3,015.42 = 1,190.36 : x
2. Step 2: Convert to fraction form
   2,185.16/3,015.42 = 1,190.36/x
3. Step 3: Cross multiply
   2,185.16x = 3,015.42 × 1,190.36
4. Step 4: Simplify right side
   2,185.16x = 3,589,435.35
5. Step 5: Solve for x
   x = 3,589,435.35/2,185.16
6. Step 6: Final answer
   x = 1,642.64