Finding the Fourth Proportional to 11,687.91, 17,532.78 and 3,896.72

Step by Step Solution

1. Step 1: Write the proportion equation
   11,687.91 : 17,532.78 = 3,896.72 : x
2. Step 2: Convert to fraction form
   11,687.91/17,532.78 = 3,896.72/x
3. Step 3: Cross multiply
   11,687.91x = 17,532.78 × 3,896.72
4. Step 4: Simplify right side
   11,687.91x = 68,320,297.95
5. Step 5: Solve for x
   x = 68,320,297.95/11,687.91
6. Step 6: Final answer
   x = 5,845.38