Finding the Fourth Proportional to 16,965.93, 25,439.55 and 13,478.25

Step by Step Solution

1. Step 1: Write the proportion equation
   16,965.93 : 25,439.55 = 13,478.25 : x
2. Step 2: Convert to fraction form
   16,965.93/25,439.55 = 13,478.25/x
3. Step 3: Cross multiply
   16,965.93x = 25,439.55 × 13,478.25
4. Step 4: Simplify right side
   16,965.93x = 342,880,614.79
5. Step 5: Solve for x
   x = 342,880,614.79/16,965.93
6. Step 6: Final answer
   x = 20,209.95