Finding the Fourth Proportional to 2,185.62, 3,016.23 and 1,399.74

Step by Step Solution

1. Step 1: Write the proportion equation
   2,185.62 : 3,016.23 = 1,399.74 : x
2. Step 2: Convert to fraction form
   2,185.62/3,016.23 = 1,399.74/x
3. Step 3: Cross multiply
   2,185.62x = 3,016.23 × 1,399.74
4. Step 4: Simplify right side
   2,185.62x = 4,221,937.78
5. Step 5: Solve for x
   x = 4,221,937.78/2,185.62
6. Step 6: Final answer
   x = 1,931.69