Finding the Fourth Proportional to 11,381.81, 17,072.69 and 3,591.23

Step by Step Solution

1. Step 1: Write the proportion equation
   11,381.81 : 17,072.69 = 3,591.23 : x
2. Step 2: Convert to fraction form
   11,381.81/17,072.69 = 3,591.23/x
3. Step 3: Cross multiply
   11,381.81x = 17,072.69 × 3,591.23
4. Step 4: Simplify right side
   11,381.81x = 61,311,956.51
5. Step 5: Solve for x
   x = 61,311,956.51/11,381.81
6. Step 6: Final answer
   x = 5,386.84