Finding the Fourth Proportional to 12,279.28, 18,417.04 and 3,958.16

Step by Step Solution

1. Step 1: Write the proportion equation
   12,279.28 : 18,417.04 = 3,958.16 : x
2. Step 2: Convert to fraction form
   12,279.28/18,417.04 = 3,958.16/x
3. Step 3: Cross multiply
   12,279.28x = 18,417.04 × 3,958.16
4. Step 4: Simplify right side
   12,279.28x = 72,897,591.05
5. Step 5: Solve for x
   x = 72,897,591.05/12,279.28
6. Step 6: Final answer
   x = 5,936.63