Finding the Fourth Proportional to 11,447.91, 17,172.17 and 3,656.72

Step by Step Solution

1. Step 1: Write the proportion equation
   11,447.91 : 17,172.17 = 3,656.72 : x
2. Step 2: Convert to fraction form
   11,447.91/17,172.17 = 3,656.72/x
3. Step 3: Cross multiply
   11,447.91x = 17,172.17 × 3,656.72
4. Step 4: Simplify right side
   11,447.91x = 62,793,817.48
5. Step 5: Solve for x
   x = 62,793,817.48/11,447.91
6. Step 6: Final answer
   x = 5,485.18