Finding the Fourth Proportional to 12,279.96, 18,423.34 and 4,889.61

Step by Step Solution

1. Step 1: Write the proportion equation
   12,279.96 : 18,423.34 = 4,889.61 : x
2. Step 2: Convert to fraction form
   12,279.96/18,423.34 = 4,889.61/x
3. Step 3: Cross multiply
   12,279.96x = 18,423.34 × 4,889.61
4. Step 4: Simplify right side
   12,279.96x = 90,082,935.27
5. Step 5: Solve for x
   x = 90,082,935.27/12,279.96
6. Step 6: Final answer
   x = 7,335.77