Finding the Fourth Proportional to 1,919.35, 2,648.96 and 1,423.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,919.35 : 2,648.96 = 1,423.40 : x
2. Step 2: Convert to fraction form
   1,919.35/2,648.96 = 1,423.40/x
3. Step 3: Cross multiply
   1,919.35x = 2,648.96 × 1,423.40
4. Step 4: Simplify right side
   1,919.35x = 3,770,529.17
5. Step 5: Solve for x
   x = 3,770,529.17/1,919.35
6. Step 6: Final answer
   x = 1,964.48