Finding the Fourth Proportional to 9,718.74, 14,579.91 and 3,144.78

Step by Step Solution

1. Step 1: Write the proportion equation
   9,718.74 : 14,579.91 = 3,144.78 : x
2. Step 2: Convert to fraction form
   9,718.74/14,579.91 = 3,144.78/x
3. Step 3: Cross multiply
   9,718.74x = 14,579.91 × 3,144.78
4. Step 4: Simplify right side
   9,718.74x = 45,850,609.37
5. Step 5: Solve for x
   x = 45,850,609.37/9,718.74
6. Step 6: Final answer
   x = 4,717.75