Finding the Fourth Proportional to 12,281.54, 18,423.98 and 4,886.78

Step by Step Solution

1. Step 1: Write the proportion equation
   12,281.54 : 18,423.98 = 4,886.78 : x
2. Step 2: Convert to fraction form
   12,281.54/18,423.98 = 4,886.78/x
3. Step 3: Cross multiply
   12,281.54x = 18,423.98 × 4,886.78
4. Step 4: Simplify right side
   12,281.54x = 90,033,912.55
5. Step 5: Solve for x
   x = 90,033,912.55/12,281.54
6. Step 6: Final answer
   x = 7,330.83