Finding the Fourth Proportional to 12,091.48, 18,129.24 and 5,839.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,091.48 : 18,129.24 = 5,839.12 : x
2. Step 2: Convert to fraction form
   12,091.48/18,129.24 = 5,839.12/x
3. Step 3: Cross multiply
   12,091.48x = 18,129.24 × 5,839.12
4. Step 4: Simplify right side
   12,091.48x = 105,858,807.87
5. Step 5: Solve for x
   x = 105,858,807.87/12,091.48
6. Step 6: Final answer
   x = 8,754.83