Finding the Fourth Proportional to 12,579.76, 18,870.27 and 4,789.18

Step by Step Solution

1. Step 1: Write the proportion equation
   12,579.76 : 18,870.27 = 4,789.18 : x
2. Step 2: Convert to fraction form
   12,579.76/18,870.27 = 4,789.18/x
3. Step 3: Cross multiply
   12,579.76x = 18,870.27 × 4,789.18
4. Step 4: Simplify right side
   12,579.76x = 90,373,119.68
5. Step 5: Solve for x
   x = 90,373,119.68/12,579.76
6. Step 6: Final answer
   x = 7,184.01