Finding the Fourth Proportional to 11,997.68, 18,005.76 and 7,836.56

Step by Step Solution

1. Step 1: Write the proportion equation
   11,997.68 : 18,005.76 = 7,836.56 : x
2. Step 2: Convert to fraction form
   11,997.68/18,005.76 = 7,836.56/x
3. Step 3: Cross multiply
   11,997.68x = 18,005.76 × 7,836.56
4. Step 4: Simplify right side
   11,997.68x = 141,103,218.59
5. Step 5: Solve for x
   x = 141,103,218.59/11,997.68
6. Step 6: Final answer
   x = 11,760.88