Finding the Fourth Proportional to 12,006.80, 16,578.16 and 7,760.37

Step by Step Solution

1. Step 1: Write the proportion equation
   12,006.80 : 16,578.16 = 7,760.37 : x
2. Step 2: Convert to fraction form
   12,006.80/16,578.16 = 7,760.37/x
3. Step 3: Cross multiply
   12,006.80x = 16,578.16 × 7,760.37
4. Step 4: Simplify right side
   12,006.80x = 128,652,636.12
5. Step 5: Solve for x
   x = 128,652,636.12/12,006.80
6. Step 6: Final answer
   x = 10,714.99