Finding the Fourth Proportional to 16,818.27, 25,230.17 and 5,128.75

Step by Step Solution

1. Step 1: Write the proportion equation
   16,818.27 : 25,230.17 = 5,128.75 : x
2. Step 2: Convert to fraction form
   16,818.27/25,230.17 = 5,128.75/x
3. Step 3: Cross multiply
   16,818.27x = 25,230.17 × 5,128.75
4. Step 4: Simplify right side
   16,818.27x = 129,399,234.39
5. Step 5: Solve for x
   x = 129,399,234.39/16,818.27
6. Step 6: Final answer
   x = 7,693.97