Finding the Fourth Proportional to 12,290.54, 18,436.77 and 4,499.18

Step by Step Solution

1. Step 1: Write the proportion equation
   12,290.54 : 18,436.77 = 4,499.18 : x
2. Step 2: Convert to fraction form
   12,290.54/18,436.77 = 4,499.18/x
3. Step 3: Cross multiply
   12,290.54x = 18,436.77 × 4,499.18
4. Step 4: Simplify right side
   12,290.54x = 82,950,346.85
5. Step 5: Solve for x
   x = 82,950,346.85/12,290.54
6. Step 6: Final answer
   x = 6,749.12