Finding the Fourth Proportional to 2,913.50, 4,019.49 and 1,919.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,913.50 : 4,019.49 = 1,919.30 : x
2. Step 2: Convert to fraction form
   2,913.50/4,019.49 = 1,919.30/x
3. Step 3: Cross multiply
   2,913.50x = 4,019.49 × 1,919.30
4. Step 4: Simplify right side
   2,913.50x = 7,714,607.16
5. Step 5: Solve for x
   x = 7,714,607.16/2,913.50
6. Step 6: Final answer
   x = 2,647.88