Finding the Fourth Proportional to 11,382.78, 17,071.38 and 3,591.57

Step by Step Solution

1. Step 1: Write the proportion equation
   11,382.78 : 17,071.38 = 3,591.57 : x
2. Step 2: Convert to fraction form
   11,382.78/17,071.38 = 3,591.57/x
3. Step 3: Cross multiply
   11,382.78x = 17,071.38 × 3,591.57
4. Step 4: Simplify right side
   11,382.78x = 61,313,056.27
5. Step 5: Solve for x
   x = 61,313,056.27/11,382.78
6. Step 6: Final answer
   x = 5,386.47