Finding the Fourth Proportional to 8,738.25, 13,099.50 and 3,187.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,738.25 : 13,099.50 = 3,187.72 : x
2. Step 2: Convert to fraction form
   8,738.25/13,099.50 = 3,187.72/x
3. Step 3: Cross multiply
   8,738.25x = 13,099.50 × 3,187.72
4. Step 4: Simplify right side
   8,738.25x = 41,757,538.14
5. Step 5: Solve for x
   x = 41,757,538.14/8,738.25
6. Step 6: Final answer
   x = 4,778.71