Finding the Fourth Proportional to 11,909.89, 17,866.66 and 3,588.81

Step by Step Solution

1. Step 1: Write the proportion equation
   11,909.89 : 17,866.66 = 3,588.81 : x
2. Step 2: Convert to fraction form
   11,909.89/17,866.66 = 3,588.81/x
3. Step 3: Cross multiply
   11,909.89x = 17,866.66 × 3,588.81
4. Step 4: Simplify right side
   11,909.89x = 64,120,048.07
5. Step 5: Solve for x
   x = 64,120,048.07/11,909.89
6. Step 6: Final answer
   x = 5,383.76