Finding the Fourth Proportional to 12,300.12, 16,974.90 and 9,311.22

Step by Step Solution

1. Step 1: Write the proportion equation
   12,300.12 : 16,974.90 = 9,311.22 : x
2. Step 2: Convert to fraction form
   12,300.12/16,974.90 = 9,311.22/x
3. Step 3: Cross multiply
   12,300.12x = 16,974.90 × 9,311.22
4. Step 4: Simplify right side
   12,300.12x = 158,057,028.38
5. Step 5: Solve for x
   x = 158,057,028.38/12,300.12
6. Step 6: Final answer
   x = 12,850.04