Finding the Fourth Proportional to 2,185.74, 3,015.27 and 1,399.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,185.74 : 3,015.27 = 1,399.50 : x
2. Step 2: Convert to fraction form
   2,185.74/3,015.27 = 1,399.50/x
3. Step 3: Cross multiply
   2,185.74x = 3,015.27 × 1,399.50
4. Step 4: Simplify right side
   2,185.74x = 4,219,870.37
5. Step 5: Solve for x
   x = 4,219,870.37/2,185.74
6. Step 6: Final answer
   x = 1,930.64