Finding the Fourth Proportional to 10,919.82, 16,382.28 and 3,128.42

Step by Step Solution

1. Step 1: Write the proportion equation
   10,919.82 : 16,382.28 = 3,128.42 : x
2. Step 2: Convert to fraction form
   10,919.82/16,382.28 = 3,128.42/x
3. Step 3: Cross multiply
   10,919.82x = 16,382.28 × 3,128.42
4. Step 4: Simplify right side
   10,919.82x = 51,250,652.40
5. Step 5: Solve for x
   x = 51,250,652.40/10,919.82
6. Step 6: Final answer
   x = 4,693.36