Finding the Fourth Proportional to 2,185.05, 3,015.42 and 1,190.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,185.05 : 3,015.42 = 1,190.38 : x
2. Step 2: Convert to fraction form
   2,185.05/3,015.42 = 1,190.38/x
3. Step 3: Cross multiply
   2,185.05x = 3,015.42 × 1,190.38
4. Step 4: Simplify right side
   2,185.05x = 3,589,495.66
5. Step 5: Solve for x
   x = 3,589,495.66/2,185.05
6. Step 6: Final answer
   x = 1,642.75