Finding the Fourth Proportional to 2,185.52, 3,015.99 and 1,190.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,185.52 : 3,015.99 = 1,190.78 : x
2. Step 2: Convert to fraction form
   2,185.52/3,015.99 = 1,190.78/x
3. Step 3: Cross multiply
   2,185.52x = 3,015.99 × 1,190.78
4. Step 4: Simplify right side
   2,185.52x = 3,591,380.57
5. Step 5: Solve for x
   x = 3,591,380.57/2,185.52
6. Step 6: Final answer
   x = 1,643.26