Finding the Fourth Proportional to 16,807.72, 25,209.78 and 5,121.04

Step by Step Solution

1. Step 1: Write the proportion equation
   16,807.72 : 25,209.78 = 5,121.04 : x
2. Step 2: Convert to fraction form
   16,807.72/25,209.78 = 5,121.04/x
3. Step 3: Cross multiply
   16,807.72x = 25,209.78 × 5,121.04
4. Step 4: Simplify right side
   16,807.72x = 129,100,291.77
5. Step 5: Solve for x
   x = 129,100,291.77/16,807.72
6. Step 6: Final answer
   x = 7,681.01