Finding the Fourth Proportional to 5,429.28, 8,144.86 and 1,919.82

Step by Step Solution

1. Step 1: Write the proportion equation
   5,429.28 : 8,144.86 = 1,919.82 : x
2. Step 2: Convert to fraction form
   5,429.28/8,144.86 = 1,919.82/x
3. Step 3: Cross multiply
   5,429.28x = 8,144.86 × 1,919.82
4. Step 4: Simplify right side
   5,429.28x = 15,636,665.13
5. Step 5: Solve for x
   x = 15,636,665.13/5,429.28
6. Step 6: Final answer
   x = 2,880.06