Finding the Fourth Proportional to 11,447.76, 17,171.49 and 3,127.61

Step by Step Solution

1. Step 1: Write the proportion equation
   11,447.76 : 17,171.49 = 3,127.61 : x
2. Step 2: Convert to fraction form
   11,447.76/17,171.49 = 3,127.61/x
3. Step 3: Cross multiply
   11,447.76x = 17,171.49 × 3,127.61
4. Step 4: Simplify right side
   11,447.76x = 53,705,778.50
5. Step 5: Solve for x
   x = 53,705,778.50/11,447.76
6. Step 6: Final answer
   x = 4,691.38