Finding the Fourth Proportional to 16,866.88, 25,300.80 and 5,180.12

Step by Step Solution

1. Step 1: Write the proportion equation
   16,866.88 : 25,300.80 = 5,180.12 : x
2. Step 2: Convert to fraction form
   16,866.88/25,300.80 = 5,180.12/x
3. Step 3: Cross multiply
   16,866.88x = 25,300.80 × 5,180.12
4. Step 4: Simplify right side
   16,866.88x = 131,061,180.10
5. Step 5: Solve for x
   x = 131,061,180.10/16,866.88
6. Step 6: Final answer
   x = 7,770.33