Finding the Fourth Proportional to 12,015.15, 18,022.83 and 7,881.33

Step by Step Solution

1. Step 1: Write the proportion equation
   12,015.15 : 18,022.83 = 7,881.33 : x
2. Step 2: Convert to fraction form
   12,015.15/18,022.83 = 7,881.33/x
3. Step 3: Cross multiply
   12,015.15x = 18,022.83 × 7,881.33
4. Step 4: Simplify right side
   12,015.15x = 142,043,870.76
5. Step 5: Solve for x
   x = 142,043,870.76/12,015.15
6. Step 6: Final answer
   x = 11,822.06