Finding the Fourth Proportional to 11,727.91, 17,588.78 and 3,405.69

Step by Step Solution

1. Step 1: Write the proportion equation
   11,727.91 : 17,588.78 = 3,405.69 : x
2. Step 2: Convert to fraction form
   11,727.91/17,588.78 = 3,405.69/x
3. Step 3: Cross multiply
   11,727.91x = 17,588.78 × 3,405.69
4. Step 4: Simplify right side
   11,727.91x = 59,901,940.67
5. Step 5: Solve for x
   x = 59,901,940.67/11,727.91
6. Step 6: Final answer
   x = 5,107.64