Finding the Fourth Proportional to 12,279, 18,426.12 and 4,488.48

Step by Step Solution

1. Step 1: Write the proportion equation
   12,279 : 18,426.12 = 4,488.48 : x
2. Step 2: Convert to fraction form
   12,279/18,426.12 = 4,488.48/x
3. Step 3: Cross multiply
   12,279x = 18,426.12 × 4,488.48
4. Step 4: Simplify right side
   12,279x = 82,705,271.10
5. Step 5: Solve for x
   x = 82,705,271.10/12,279
6. Step 6: Final answer
   x = 6,735.51