Finding the Fourth Proportional to 16,958.59, 25,434.93 and 4,478.71

Step by Step Solution

1. Step 1: Write the proportion equation
   16,958.59 : 25,434.93 = 4,478.71 : x
2. Step 2: Convert to fraction form
   16,958.59/25,434.93 = 4,478.71/x
3. Step 3: Cross multiply
   16,958.59x = 25,434.93 × 4,478.71
4. Step 4: Simplify right side
   16,958.59x = 113,915,675.34
5. Step 5: Solve for x
   x = 113,915,675.34/16,958.59
6. Step 6: Final answer
   x = 6,717.28