Finding the Fourth Proportional to 2,185.06, 3,014.58 and 1,399.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,185.06 : 3,014.58 = 1,399.57 : x
2. Step 2: Convert to fraction form
   2,185.06/3,014.58 = 1,399.57/x
3. Step 3: Cross multiply
   2,185.06x = 3,014.58 × 1,399.57
4. Step 4: Simplify right side
   2,185.06x = 4,219,103.30
5. Step 5: Solve for x
   x = 4,219,103.30/2,185.06
6. Step 6: Final answer
   x = 1,930.88