Finding the Fourth Proportional to 2,185.41, 3,015.78 and 1,190.67

Step by Step Solution

1. Step 1: Write the proportion equation
   2,185.41 : 3,015.78 = 1,190.67 : x
2. Step 2: Convert to fraction form
   2,185.41/3,015.78 = 1,190.67/x
3. Step 3: Cross multiply
   2,185.41x = 3,015.78 × 1,190.67
4. Step 4: Simplify right side
   2,185.41x = 3,590,798.77
5. Step 5: Solve for x
   x = 3,590,798.77/2,185.41
6. Step 6: Final answer
   x = 1,643.08