Finding the Fourth Proportional to 9,958.71, 14,940.66 and 3,718.78

Step by Step Solution

1. Step 1: Write the proportion equation
   9,958.71 : 14,940.66 = 3,718.78 : x
2. Step 2: Convert to fraction form
   9,958.71/14,940.66 = 3,718.78/x
3. Step 3: Cross multiply
   9,958.71x = 14,940.66 × 3,718.78
4. Step 4: Simplify right side
   9,958.71x = 55,560,952.89
5. Step 5: Solve for x
   x = 55,560,952.89/9,958.71
6. Step 6: Final answer
   x = 5,579.13