Finding the Fourth Proportional to 16,866.78, 25,300.21 and 5,179.98

Step by Step Solution

1. Step 1: Write the proportion equation
   16,866.78 : 25,300.21 = 5,179.98 : x
2. Step 2: Convert to fraction form
   16,866.78/25,300.21 = 5,179.98/x
3. Step 3: Cross multiply
   16,866.78x = 25,300.21 × 5,179.98
4. Step 4: Simplify right side
   16,866.78x = 131,054,581.80
5. Step 5: Solve for x
   x = 131,054,581.80/16,866.78
6. Step 6: Final answer
   x = 7,769.98