Finding the Fourth Proportional to 11,987.44, 17,981.05 and 3,667.42

Step by Step Solution

1. Step 1: Write the proportion equation
   11,987.44 : 17,981.05 = 3,667.42 : x
2. Step 2: Convert to fraction form
   11,987.44/17,981.05 = 3,667.42/x
3. Step 3: Cross multiply
   11,987.44x = 17,981.05 × 3,667.42
4. Step 4: Simplify right side
   11,987.44x = 65,944,062.39
5. Step 5: Solve for x
   x = 65,944,062.39/11,987.44
6. Step 6: Final answer
   x = 5,501.10