Finding the Fourth Proportional to 11,447.91, 17,171.69 and 8,347.59

Step by Step Solution

1. Step 1: Write the proportion equation
   11,447.91 : 17,171.69 = 8,347.59 : x
2. Step 2: Convert to fraction form
   11,447.91/17,171.69 = 8,347.59/x
3. Step 3: Cross multiply
   11,447.91x = 17,171.69 × 8,347.59
4. Step 4: Simplify right side
   11,447.91x = 143,342,185.99
5. Step 5: Solve for x
   x = 143,342,185.99/11,447.91
6. Step 6: Final answer
   x = 12,521.25