Finding the Fourth Proportional to 10,939.10, 16,406.67 and 3,146

Step by Step Solution

1. Step 1: Write the proportion equation
   10,939.10 : 16,406.67 = 3,146 : x
2. Step 2: Convert to fraction form
   10,939.10/16,406.67 = 3,146/x
3. Step 3: Cross multiply
   10,939.10x = 16,406.67 × 3,146
4. Step 4: Simplify right side
   10,939.10x = 51,615,383.82
5. Step 5: Solve for x
   x = 51,615,383.82/10,939.10
6. Step 6: Final answer
   x = 4,718.43