Finding the Fourth Proportional to 10,940.16, 16,407 and 3,149.76

Step by Step Solution

1. Step 1: Write the proportion equation
   10,940.16 : 16,407 = 3,149.76 : x
2. Step 2: Convert to fraction form
   10,940.16/16,407 = 3,149.76/x
3. Step 3: Cross multiply
   10,940.16x = 16,407 × 3,149.76
4. Step 4: Simplify right side
   10,940.16x = 51,678,112.32
5. Step 5: Solve for x
   x = 51,678,112.32/10,940.16
6. Step 6: Final answer
   x = 4,723.71