Finding the Fourth Proportional to 12,196.80, 16,830.27 and 6,891.48

Step by Step Solution

1. Step 1: Write the proportion equation
   12,196.80 : 16,830.27 = 6,891.48 : x
2. Step 2: Convert to fraction form
   12,196.80/16,830.27 = 6,891.48/x
3. Step 3: Cross multiply
   12,196.80x = 16,830.27 × 6,891.48
4. Step 4: Simplify right side
   12,196.80x = 115,985,469.10
5. Step 5: Solve for x
   x = 115,985,469.10/12,196.80
6. Step 6: Final answer
   x = 9,509.50