Finding the Fourth Proportional to 12,146.15, 16,767.91 and 7,674.55

Step by Step Solution

1. Step 1: Write the proportion equation
   12,146.15 : 16,767.91 = 7,674.55 : x
2. Step 2: Convert to fraction form
   12,146.15/16,767.91 = 7,674.55/x
3. Step 3: Cross multiply
   12,146.15x = 16,767.91 × 7,674.55
4. Step 4: Simplify right side
   12,146.15x = 128,686,131.36
5. Step 5: Solve for x
   x = 128,686,131.36/12,146.15
6. Step 6: Final answer
   x = 10,594.81