Finding the Fourth Proportional to 12,231.42, 16,862.89 and 7,974.06

Step by Step Solution

1. Step 1: Write the proportion equation
   12,231.42 : 16,862.89 = 7,974.06 : x
2. Step 2: Convert to fraction form
   12,231.42/16,862.89 = 7,974.06/x
3. Step 3: Cross multiply
   12,231.42x = 16,862.89 × 7,974.06
4. Step 4: Simplify right side
   12,231.42x = 134,465,739.93
5. Step 5: Solve for x
   x = 134,465,739.93/12,231.42
6. Step 6: Final answer
   x = 10,993.47