Finding the Fourth Proportional to 6,426.86, 9,643.41 and 2,919.15

Step by Step Solution

1. Step 1: Write the proportion equation
   6,426.86 : 9,643.41 = 2,919.15 : x
2. Step 2: Convert to fraction form
   6,426.86/9,643.41 = 2,919.15/x
3. Step 3: Cross multiply
   6,426.86x = 9,643.41 × 2,919.15
4. Step 4: Simplify right side
   6,426.86x = 28,150,560.30
5. Step 5: Solve for x
   x = 28,150,560.30/6,426.86
6. Step 6: Final answer
   x = 4,380.15