Finding the Fourth Proportional to 12,465.54, 18,698.20 and 3,105.49

Step by Step Solution

1. Step 1: Write the proportion equation
   12,465.54 : 18,698.20 = 3,105.49 : x
2. Step 2: Convert to fraction form
   12,465.54/18,698.20 = 3,105.49/x
3. Step 3: Cross multiply
   12,465.54x = 18,698.20 × 3,105.49
4. Step 4: Simplify right side
   12,465.54x = 58,067,073.12
5. Step 5: Solve for x
   x = 58,067,073.12/12,465.54
6. Step 6: Final answer
   x = 4,658.21