Finding the Fourth Proportional to 12,066.15, 16,651.90 and 6,689.16

Step by Step Solution

1. Step 1: Write the proportion equation
   12,066.15 : 16,651.90 = 6,689.16 : x
2. Step 2: Convert to fraction form
   12,066.15/16,651.90 = 6,689.16/x
3. Step 3: Cross multiply
   12,066.15x = 16,651.90 × 6,689.16
4. Step 4: Simplify right side
   12,066.15x = 111,387,147.31
5. Step 5: Solve for x
   x = 111,387,147.31/12,066.15
6. Step 6: Final answer
   x = 9,231.38