Finding the Fourth Proportional to 11,987.99, 17,981.33 and 3,668.01

Step by Step Solution

1. Step 1: Write the proportion equation
   11,987.99 : 17,981.33 = 3,668.01 : x
2. Step 2: Convert to fraction form
   11,987.99/17,981.33 = 3,668.01/x
3. Step 3: Cross multiply
   11,987.99x = 17,981.33 × 3,668.01
4. Step 4: Simplify right side
   11,987.99x = 65,955,608.35
5. Step 5: Solve for x
   x = 65,955,608.35/11,987.99
6. Step 6: Final answer
   x = 5,501.81