Finding the Fourth Proportional to 11,391.59, 17,086.62 and 5,472.71

Step by Step Solution

1. Step 1: Write the proportion equation
   11,391.59 : 17,086.62 = 5,472.71 : x
2. Step 2: Convert to fraction form
   11,391.59/17,086.62 = 5,472.71/x
3. Step 3: Cross multiply
   11,391.59x = 17,086.62 × 5,472.71
4. Step 4: Simplify right side
   11,391.59x = 93,510,196.02
5. Step 5: Solve for x
   x = 93,510,196.02/11,391.59
6. Step 6: Final answer
   x = 8,208.71