Finding the Fourth Proportional to 16,778.72, 23,147.32 and 10,403.64

Step by Step Solution

1. Step 1: Write the proportion equation
   16,778.72 : 23,147.32 = 10,403.64 : x
2. Step 2: Convert to fraction form
   16,778.72/23,147.32 = 10,403.64/x
3. Step 3: Cross multiply
   16,778.72x = 23,147.32 × 10,403.64
4. Step 4: Simplify right side
   16,778.72x = 240,816,384.24
5. Step 5: Solve for x
   x = 240,816,384.24/16,778.72
6. Step 6: Final answer
   x = 14,352.49