Finding the Fourth Proportional to 1,419.40, 1,956.18 and 1,399.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,419.40 : 1,956.18 = 1,399.24 : x
2. Step 2: Convert to fraction form
   1,419.40/1,956.18 = 1,399.24/x
3. Step 3: Cross multiply
   1,419.40x = 1,956.18 × 1,399.24
4. Step 4: Simplify right side
   1,419.40x = 2,737,165.30
5. Step 5: Solve for x
   x = 2,737,165.30/1,419.40
6. Step 6: Final answer
   x = 1,928.40