Finding the Fourth Proportional to 11,557.72, 17,339.18 and 3,660.72

Step by Step Solution

1. Step 1: Write the proportion equation
   11,557.72 : 17,339.18 = 3,660.72 : x
2. Step 2: Convert to fraction form
   11,557.72/17,339.18 = 3,660.72/x
3. Step 3: Cross multiply
   11,557.72x = 17,339.18 × 3,660.72
4. Step 4: Simplify right side
   11,557.72x = 63,473,883.01
5. Step 5: Solve for x
   x = 63,473,883.01/11,557.72
6. Step 6: Final answer
   x = 5,491.90