Finding the Fourth Proportional to 16,978.79, 25,494.83 and 14,380.35

Step by Step Solution

1. Step 1: Write the proportion equation
   16,978.79 : 25,494.83 = 14,380.35 : x
2. Step 2: Convert to fraction form
   16,978.79/25,494.83 = 14,380.35/x
3. Step 3: Cross multiply
   16,978.79x = 25,494.83 × 14,380.35
4. Step 4: Simplify right side
   16,978.79x = 366,624,506.69
5. Step 5: Solve for x
   x = 366,624,506.69/16,978.79
6. Step 6: Final answer
   x = 21,593.09