Finding the Fourth Proportional to 12,279.28, 18,418.89 and 3,514.18

Step by Step Solution

1. Step 1: Write the proportion equation
   12,279.28 : 18,418.89 = 3,514.18 : x
2. Step 2: Convert to fraction form
   12,279.28/18,418.89 = 3,514.18/x
3. Step 3: Cross multiply
   12,279.28x = 18,418.89 × 3,514.18
4. Step 4: Simplify right side
   12,279.28x = 64,727,294.86
5. Step 5: Solve for x
   x = 64,727,294.86/12,279.28
6. Step 6: Final answer
   x = 5,271.26