Finding the Fourth Proportional to 2,284.20, 3,151.98 and 1,399.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,284.20 : 3,151.98 = 1,399.86 : x
2. Step 2: Convert to fraction form
   2,284.20/3,151.98 = 1,399.86/x
3. Step 3: Cross multiply
   2,284.20x = 3,151.98 × 1,399.86
4. Step 4: Simplify right side
   2,284.20x = 4,412,330.72
5. Step 5: Solve for x
   x = 4,412,330.72/2,284.20
6. Step 6: Final answer
   x = 1,931.67