Finding the Fourth Proportional to 11,728.05, 17,585.33 and 3,611.49

Step by Step Solution

1. Step 1: Write the proportion equation
   11,728.05 : 17,585.33 = 3,611.49 : x
2. Step 2: Convert to fraction form
   11,728.05/17,585.33 = 3,611.49/x
3. Step 3: Cross multiply
   11,728.05x = 17,585.33 × 3,611.49
4. Step 4: Simplify right side
   11,728.05x = 63,509,278.38
5. Step 5: Solve for x
   x = 63,509,278.38/11,728.05
6. Step 6: Final answer
   x = 5,415.16