Finding the Fourth Proportional to 12,478.86, 18,718.25 and 5,081.58

Step by Step Solution

1. Step 1: Write the proportion equation
   12,478.86 : 18,718.25 = 5,081.58 : x
2. Step 2: Convert to fraction form
   12,478.86/18,718.25 = 5,081.58/x
3. Step 3: Cross multiply
   12,478.86x = 18,718.25 × 5,081.58
4. Step 4: Simplify right side
   12,478.86x = 95,118,259.43
5. Step 5: Solve for x
   x = 95,118,259.43/12,478.86
6. Step 6: Final answer
   x = 7,622.35