Finding the Fourth Proportional to 12,479.15, 18,713.55 and 5,078.59

Step by Step Solution

1. Step 1: Write the proportion equation
   12,479.15 : 18,713.55 = 5,078.59 : x
2. Step 2: Convert to fraction form
   12,479.15/18,713.55 = 5,078.59/x
3. Step 3: Cross multiply
   12,479.15x = 18,713.55 × 5,078.59
4. Step 4: Simplify right side
   12,479.15x = 95,038,447.89
5. Step 5: Solve for x
   x = 95,038,447.89/12,479.15
6. Step 6: Final answer
   x = 7,615.78