Finding the Fourth Proportional to 16,808.10, 25,216.83 and 5,121.30

Step by Step Solution

1. Step 1: Write the proportion equation
   16,808.10 : 25,216.83 = 5,121.30 : x
2. Step 2: Convert to fraction form
   16,808.10/25,216.83 = 5,121.30/x
3. Step 3: Cross multiply
   16,808.10x = 25,216.83 × 5,121.30
4. Step 4: Simplify right side
   16,808.10x = 129,142,951.48
5. Step 5: Solve for x
   x = 129,142,951.48/16,808.10
6. Step 6: Final answer
   x = 7,683.38