Finding the Fourth Proportional to 12,279.55, 18,419.51 and 3,514.48

Step by Step Solution

1. Step 1: Write the proportion equation
   12,279.55 : 18,419.51 = 3,514.48 : x
2. Step 2: Convert to fraction form
   12,279.55/18,419.51 = 3,514.48/x
3. Step 3: Cross multiply
   12,279.55x = 18,419.51 × 3,514.48
4. Step 4: Simplify right side
   12,279.55x = 64,734,999.50
5. Step 5: Solve for x
   x = 64,734,999.50/12,279.55
6. Step 6: Final answer
   x = 5,271.77