Finding the Fourth Proportional to 11,759.50, 17,640.72 and 3,551.50

Step by Step Solution

1. Step 1: Write the proportion equation
   11,759.50 : 17,640.72 = 3,551.50 : x
2. Step 2: Convert to fraction form
   11,759.50/17,640.72 = 3,551.50/x
3. Step 3: Cross multiply
   11,759.50x = 17,640.72 × 3,551.50
4. Step 4: Simplify right side
   11,759.50x = 62,651,017.08
5. Step 5: Solve for x
   x = 62,651,017.08/11,759.50
6. Step 6: Final answer
   x = 5,327.69