Finding the Fourth Proportional to 12,648.78, 18,965.61 and 4,326.03

Step by Step Solution

1. Step 1: Write the proportion equation
   12,648.78 : 18,965.61 = 4,326.03 : x
2. Step 2: Convert to fraction form
   12,648.78/18,965.61 = 4,326.03/x
3. Step 3: Cross multiply
   12,648.78x = 18,965.61 × 4,326.03
4. Step 4: Simplify right side
   12,648.78x = 82,045,797.83
5. Step 5: Solve for x
   x = 82,045,797.83/12,648.78
6. Step 6: Final answer
   x = 6,486.46